Stock-Based Compensation Stock-based Compensation Expense (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
2016	$ 1,857
2017	1,709
2018	309
2019	121
2020	51
Total	$ 4,047

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Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options, Year Five

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Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options, Year Three

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Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options, Year Two

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Unrecognized cost of unvested options awarded to employees as compensation.

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