Income Taxes - Current and Long-Term Deferred Tax Assests and Liabilities (Details 4) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Non-current deferred tax assets	$ 45,839	$ 63,809
Non-current deferred tax liabilities	(2,367)	(6,421)
Total net deferred tax assets	43,472	57,388
Total net deferred tax assets	$ 43,472	$ 57,388