Income Taxes - Schedule of Reconciliation of Total Amounts of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit, beginning of year	$ 3	$ 46	$ (4)
Additions based on current year tax positions	0	0	21
Additions for prior years' tax positions	0	0	29
Settlements with tax authorities	0	(13)	0
Reductions for prior years' tax positions	0	(30)	0
Unrecognized tax benefit, end of year	$ 3	$ 3	$ 46