Stock-Based Compensation - Schedule of Share-based Compensation, Additional Information (Details) - Stock Options and Restricted Stock Units [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value (in usd per share)	$ 8.37	$ 18.58	$ 12.43
Aggregate intrinsic value of options exercised	$ 330	$ 297	$ 370
Total fair value of shares vested	$ 7,028	$ 8,231	$ 4,895

Share-based Compensation Arrangement by Share-based Payment Award, Options And Other Equity Instruments, Grants in Period, Weighted Average Grant Date Fair Value

No definition available.

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