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Employee Stock Plans (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
2010 Plan
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Sep. 30, 2014
Restricted Stock Share Awards
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Sep. 30, 2013
Restricted Stock Share Awards
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Jun. 30, 2014
Restricted Stock Share Awards
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Sep. 30, 2014
Restricted Stock Share Awards
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Sep. 30, 2013
Restricted Stock Share Awards
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Dec. 31, 2013
Restricted Stock Share Awards
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Sep. 30, 2014
Performance Share Unit Awards
2010 Plan
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Sep. 30, 2014
Performance Share Unit Awards
2010 Plan
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Sep. 30, 2014
Restricted Stock Unit Awards
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Sep. 30, 2013
Restricted Stock Unit Awards
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Sep. 30, 2014
Restricted Stock Unit Awards
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Sep. 30, 2013
Restricted Stock Unit Awards
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Dec. 31, 2013
Restricted Stock Unit Awards
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Mar. 31, 2014
Restricted Stock Unit Awards
Non-employee director
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Mar. 31, 2014
Restricted Stock Unit Awards
Management
age
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Mar. 31, 2013
Restricted Stock Unit Awards
Management
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Sep. 30, 2014
Stock Options
A&R 2004 Plan
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Sep. 30, 2014
Stock Options
A&R 2004 Plan
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| Stock-based compensation | |||||||||||||||||||
| Number of shares of common stock reserved for issuance | 37,240 | 37,240 | |||||||||||||||||
| Expiration period | 10 years | ||||||||||||||||||
| Number of awards permitted to be issued (in shares) | 0 | ||||||||||||||||||
| Stock options exercised (in shares) | 0 | ||||||||||||||||||
| Maximum number of shares of common stock that may be issued | 2,130,000 | ||||||||||||||||||
| Shares | |||||||||||||||||||
| Unvested at the beginning of the period (in shares) | 169,903 | 169,903 | 43,348 | ||||||||||||||||
| Granted (in shares) | 140,291 | ||||||||||||||||||
| Vested (in shares) | (84,882) | (102,016) | |||||||||||||||||
| Cancelled and forfeited (in shares) | 0 | ||||||||||||||||||
| Unvested at the end of the period (in shares) | 85,021 | 85,021 | 169,903 | 81,623 | 81,623 | 43,348 | |||||||||||||
| Expected to vest in the future, at the end of the period (in shares) | 81,960 | 81,960 | 78,685 | 78,685 | |||||||||||||||
| Weighted Average Grant Date Fair Value | |||||||||||||||||||
| Unvested at the beginning of the period (in dollars per share) | $ 13.03 | $ 13.03 | $ 14.46 | ||||||||||||||||
| Granted (in dollars per share) | $ 0.00 | $ 16.30 | $ 15.29 | ||||||||||||||||
| Vested (in dollars per share) | $ 13.05 | $ 15.13 | |||||||||||||||||
| Cancelled and forfeited (in dollars per share) | $ 0.00 | ||||||||||||||||||
| Unvested at the end of the period (in dollars per share) | $ 13.02 | $ 13.02 | $ 13.03 | $ 15.05 | $ 15.05 | $ 14.46 | |||||||||||||
| Expected to vest in the future, at the end of the period (in dollars per share) | $ 13.02 | $ 13.02 | $ 15.05 | $ 15.05 | |||||||||||||||
| Weighted Average Remaining Contractual Term | |||||||||||||||||||
| Unvested at the beginning of the period | 9 months 4 days | 1 year 4 months 2 days | 1 year 4 months 2 days | 1 year 6 months 18 days | |||||||||||||||
| Granted | 8 months 23 days | ||||||||||||||||||
| Unvested at the end of the period | 9 months 4 days | 1 year 4 months 2 days | 1 year 4 months 2 days | 1 year 6 months 18 days | |||||||||||||||
| Expected to vest in future, at the end of the period | 9 months 4 days | 1 year 4 months 2 days | |||||||||||||||||
| Recognized and unrecognized compensation expense with weighted average recognition period | |||||||||||||||||||
| Vesting period of awards | 2 years | ||||||||||||||||||
| Compensation expenses recognized | $ 215 | $ 264 | $ 660 | $ 832 | $ 171 | $ 390 | $ 160 | $ 70 | $ 1,093 | $ 782 | |||||||||
| Unrecognized compensation expense, net of expected forfeitures, calculated under the fair value method for shares expected to vest | 574 | 574 | 479 | 479 | 772 | 772 | |||||||||||||
| Weighted average period over which unrecognized compensation expense is expected to be recognized | 9 months 4 days | ||||||||||||||||||
| Minimum age of employee, attaining which awards are continued to be vested upon retirement | 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 | 55 | ||||||||||||||||||
| Accelerated stock based compensation expense | $ 278 | $ 261 | |||||||||||||||||
| Number of shares issued upon exercise of units other than options | 1 | 1 | |||||||||||||||||