Income Taxes (Summary of the Company's Income Tax Provision) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2016
Income (loss) before taxes	$ 9,752	$ (10,229)	$ 13,568	$ (16,426)
Income tax expense (benefit)	2,857	(3,582)	4,184	(9,114)
Net income (loss)	$ 6,895	$ (6,647)	$ 9,384	$ (7,312)
Income tax expense (benefit) as a percentage of income (loss) before income taxes	29.30%	(35.00%)	30.80%	(55.50%)
Forecast
Income tax expense (benefit) as a percentage of income (loss) before income taxes					30.90%