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Employee Stock Plans (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2014
Stock Incentive Plan 2010 [Member]
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Jun. 30, 2014
Restricted Stock [Member]
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Jun. 30, 2014
Restricted Stock [Member]
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Dec. 31, 2013
Restricted Stock [Member]
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Jun. 30, 2014
Performance Shares [Member]
Stock Incentive Plan 2010 [Member]
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Jun. 30, 2014
Performance Shares [Member]
Stock Incentive Plan 2010 [Member]
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Mar. 31, 2014
Performance Shares [Member]
Stock Incentive Plan 2010 [Member]
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Jun. 30, 2014
Restricted Stock Units (RSUs) [Member]
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Mar. 31, 2014
Restricted Stock Units (RSUs) [Member]
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Jun. 30, 2014
Restricted Stock Units (RSUs) [Member]
|
Dec. 31, 2013
Restricted Stock Units (RSUs) [Member]
|
Mar. 31, 2014
Restricted Stock Units (RSUs) [Member]
Director [Member]
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Mar. 31, 2014
Restricted Stock Units (RSUs) [Member]
Management [Member]
age
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Mar. 31, 2013
Restricted Stock Units (RSUs) [Member]
Management [Member]
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Jun. 30, 2014
Employee Stock Option [Member]
Amended and Restated 2004 Stock Incentive Plan [Member]
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Jun. 30, 2014
Employee Stock Option [Member]
Amended and Restated 2004 Stock Incentive Plan [Member]
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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 | 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 | 43,348 | 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 | |||||||||||||
| Weighted Average Grant Date Fair Value | ||||||||||||||||
| Unvested at the beginning of the period (in dollars per share) | $ 13.03 | $ 14.46 | $ 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 | |||||||||||||
| Weighted Average Remaining Contractual Term | ||||||||||||||||
| Unvested at the beginning of the period | 1 year 4 days | 1 year 4 months 2 days | 1 year 7 months 2 days | 1 year 6 months 18 days | ||||||||||||
| Granted | 10 months 10 days | |||||||||||||||
| Unvested at the end of the period | 1 year 4 days | 1 year 4 months 2 days | 1 year 7 months 2 days | 1 year 6 months 18 days | ||||||||||||
| Expected to vest in future, at the end of the period | 1 year 4 days | 1 year 7 months 2 days | ||||||||||||||
| Recognized and unrecognized compensation expense with weighted average recognition period | ||||||||||||||||
| Vesting period of awards | 2 years | |||||||||||||||
| Compensation expenses recognized | $ 231 | $ 451 | $ 163 | $ 212 | $ 181 | $ 934 | ||||||||||
| Unrecognized compensation expense, net of expected forfeitures, calculated under the fair value method for shares expected to vest | 789 | 789 | 621 | 931 | 931 | |||||||||||
| Weighted average period over which unrecognized compensation expense is expected to be recognized | 1 year 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 | ||||||||||||||