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Income Taxes (Details) - Income Before Income Tax Provision (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Income Tax [Abstract] | |||||||||||
| Domestic | $ 64,281 | $ 61,983 | $ 45,256 | ||||||||
| International | 14 | 86 | 101 | ||||||||
| Total income before income tax provision | $ 10,945 | $ 13,260 | $ 16,988 | $ 23,102 | $ 16,080 | $ 11,982 | $ 21,241 | $ 12,766 | $ 64,295 | $ 62,069 | $ 45,357 |