Income Taxes (Summary of the Company's Income Tax Provision) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2016
Income (loss) before taxes	$ 6,001	$ (4,276)	$ 19,569	$ (20,702)
Income tax expense (benefit)	2,111	(1,268)	6,295	(10,382)
Net income (loss)	$ 3,890	$ (3,008)	$ 13,274	$ (10,320)
Income tax expense (benefit) as a percentage of income (loss) before income taxes	35.20%	(29.70%)	32.20%	(50.10%)
Forecast
Income tax expense (benefit) as a percentage of income (loss) before income taxes					32.40%