Income Taxes - Current and Noncurrent Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Deferred tax assets	$ 26,668	$ 16,655
Deferred tax liabilities	(4,489)	(2,463)
Current deferred tax assets, net	22,179	14,192
Deferred tax assets	30,171	56,740
Deferred tax liabilities	(85,173)	(111,398)
Noncurrent deferred tax liabilities, net	$ 55,002	$ 54,658