Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Year for audit of federal and state tax return by revenue service	2012
Accrued interest and penalties for uncertain tax positions	$ 0	$ 0	$ 0
Income Taxes Paid	510,000	$ 1,200,000	$ 3,000,000
Income tax refunds	$ 133,000