Quarterly report pursuant to Section 13 or 15(d)

Employee Stock Plans (Details)

v3.2.0.727
Employee Stock Plans (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
USD ($)
age
$ / shares
shares
Mar. 31, 2015
USD ($)
$ / shares
shares
Sep. 30, 2014
Jun. 30, 2014
USD ($)
shares
Mar. 31, 2014
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2015
USD ($)
$ / shares
shares
Jun. 30, 2014
USD ($)
shares
Jun. 30, 2013
USD ($)
Dec. 31, 2014
$ / shares
shares
2010 Plan                    
Stock-based compensation                    
Maximum number of shares of common stock that may be issued 2,130,000           2,130,000      
Restricted Stock Share Awards                    
Shares                    
Unvested at the beginning of the period (in shares)   85,021         85,021      
Vested (in shares)             70,320      
Cancelled and forfeited (in shares) 0                  
Unvested at the end of the period (in shares) 14,701           14,701     85,021
Expected to vest in the future, at the end of the period (in shares) 14,172           14,172      
Weighted Average Grant Date Fair Value                    
Unvested at the beginning of the period (in dollars per share) | $ / shares   $ 13.02         $ 13.02      
Granted (in dollars per share) | $ / shares $ 0.00                  
Vested (in dollars per share) | $ / shares             12.65      
Unvested at the end of the period (in dollars per share) | $ / shares 14.78           14.78     $ 13.02
Expected to vest in the future, at the end of the period (in dollars per share) | $ / shares $ 14.78           $ 14.78      
Weighted Average Remaining Contractual Term                    
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms 6 months                 6 months 4 days
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms 6 months                 6 months 4 days
Expected to vest in future, at the end of the period 6 months                  
Recognized and unrecognized compensation expense with weighted average recognition period                    
Compensation expenses recognized | $ $ 107,000     $ 231,000     $ 272,000 $ 451,000    
Unrecognized compensation expense, net of expected forfeitures, calculated under the fair value method for shares expected to vest | $ $ 105,000           105,000      
Weighted average period over which unrecognized compensation expense is expected to be recognized     6 months              
Performance Share Unit Awards | 2010 Plan                    
Weighted Average Grant Date Fair Value                    
Granted (in dollars per share) | $ / shares   $ 22.63                
Recognized and unrecognized compensation expense with weighted average recognition period                    
Vesting period of awards 2 years                  
Compensation expenses recognized | $ $ 402,000         $ 163,000 529,000   $ 212,000.000  
Unrecognized compensation expense, net of expected forfeitures, calculated under the fair value method for shares expected to vest | $ $ 1,163,000           $ 1,163,000      
Restricted Stock Unit Awards                    
Shares                    
Unvested at the beginning of the period (in shares)   81,623         81,623      
Granted (in shares)             116,141      
Vested (in shares)             103,157      
Cancelled and forfeited (in shares)             (1,882)      
Unvested at the end of the period (in shares) 92,725           92,725     81,623
Expected to vest in the future, at the end of the period (in shares) 89,387           89,387      
Weighted Average Grant Date Fair Value                    
Unvested at the beginning of the period (in dollars per share) | $ / shares   $ 15.05         $ 15.05      
Granted (in dollars per share) | $ / shares             18.72      
Vested (in dollars per share) | $ / shares             17.22      
Cancelled and forfeited (in dollars per share) | $ / shares             15.82      
Unvested at the end of the period (in dollars per share) | $ / shares $ 17.24           17.24     $ 15.05
Expected to vest in the future, at the end of the period (in dollars per share) | $ / shares $ 17.24           $ 17.24      
Weighted Average Remaining Contractual Term                    
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms 10 months 24 days                 1 year 1 month 2 days
Granted             7 months 10 days      
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms 10 months 24 days                 1 year 1 month 2 days
Expected to vest in future, at the end of the period 10 months 24 days                  
Recognized and unrecognized compensation expense with weighted average recognition period                    
Compensation expenses recognized | $ $ 348,000         $ 181,000 $ 1,180,000   $ 934,000  
Unrecognized compensation expense, net of expected forfeitures, calculated under the fair value method for shares expected to vest | $ $ 841,000           $ 841,000      
Restricted Stock Unit Awards | Non-employee director                    
Recognized and unrecognized compensation expense with weighted average recognition period                    
Number of shares issued upon exercise of units other than options 1                  
Restricted Stock Unit Awards | Management                    
Recognized and unrecognized compensation expense with weighted average recognition period                    
Minimum age of employee, attaining which awards are continued to be vested upon retirement | age 65                  
Minimum service period, upon serving which awards are continued to be vested upon retirement 10 years                  
Minimum age of employee along with service period condition, attaining which awards are continued to be vested upon retirement | age 55                  
Accelerated stock based compensation expense | $   $ 303,000     $ 278,000          
Restricted Stock Unit Awards | Common Stock | Management                    
Recognized and unrecognized compensation expense with weighted average recognition period                    
Number of shares issued upon exercise of units other than options   1                
Restricted Stock Unit Awards | 2010 Plan                    
Recognized and unrecognized compensation expense with weighted average recognition period                    
Maximum period following a termination of service in which the share-based award will be settled 2 months 15 days                  
Stock Options | A&R 2004 Plan                    
Stock-based compensation                    
Shares reserved for issuance 37,240           37,240      
Expiration period 10 years                  
Number of shares of common stock available for grant 0           0      
Options                    
Exercised (in shares) 0     0     0 0