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Stock-Based Compensation (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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| Summary of compensation expense and stock award activity | ||||
| Stock-based compensation expense | $ 2,097 | $ 1,620 | $ 3,941 | $ 3,273 |
| Exercise of stock options, shares | 199,827 | 10,600 | 322,100 | 79,300 |
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Performance based awards [Member]
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| Summary of compensation expense and stock award activity | ||||
| Non-vested shares granted | 0 | 0 | 62,500 | 56,250 |
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Restricted Stock Awards [Member]
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| Summary of compensation expense and stock award activity | ||||
| Non-vested shares granted | 10,000 | 20,500 | 342,100 | 369,750 |
| Restricted stock awards vested (includes performance based awards) | 6,200 | 3,400 | 280,800 | 197,016 |
| X | ||||||||||
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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