Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Valuation allowance	$ 5,135,000	$ 6,012,000
Valuation allowance, decrease	900,000
Unrecognized tax benefits	1,700,000	1,700,000
Unrecognized tax benefits that would impact effective tax rate	0	0
Unrecognized tax benefits, period increase (decrease)	0	0
Unrecognized tax benefits, income tax penalties accrued	0	0
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0	0
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 427,300,000	$ 325,700,000