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Stock-Based Compensation - Schedule of Unrecognized Compensation Costs Related to Non-Vested Stock-Based Compensation Arrangements Granted under Equity Plan and Weighted-Average Period of Years Expected to Recognize Those Costs (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended |
|---|---|
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Mar. 31, 2015
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| Stock Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Total Unrecognized Compensation Cost | $ 1,165 |
| Weighted -average Remaining Recognition Period | 1 year 7 months 1 day |
| Restricted Stock And Performance Shares [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Total Unrecognized Compensation Cost | $ 12,764 |
| Weighted -average Remaining Recognition Period | 2 years 7 days |