Income Taxes (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (31,914)	$ 13,315	$ 15,176
Income tax expense (benefit) rate for the period	15.70%	35.70%	38.30%
Computed expected income tax expense (benefit)	35.00%	35.00%	35.00%