Income Taxes, Components of Deferred Taxes, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets, Net [Abstract]
Net current deferred tax assets	$ 0	$ 0
Net noncurrent deferred tax assets	35,752	40,373
Total net deferred tax assets	35,752	40,373
Deferred Tax Liabilities, Net [Abstract]
Net current deferred tax liabilities	0	0
Net noncurrent deferred tax liabilities	643	16,177
Total net deferred tax liabilities	643	16,177
Deferred taxes, net	$ 35,109	$ 24,196