Income Taxes, Operating Loss Carryforward (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Operating Loss Carryforwards [Line Items]
Benefit within additional paid in capital on realization of operating loss carryforward	$ 1.7
Tax expense associated with deferred tax asset valuation allowance	$ 0.1
Percentage for recognition of uncertain tax positions, minimum	50.00%
State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforward	$ 7.2
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforward	$ 18.8