Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Taxes [Line Items]
Effective income tax rate	33.40%	28.80%	33.40%	32.30%
Valuation allowance	$ 0		$ 0
Testing period			5 years
AMT credit carryovers	1,400,000		$ 1,400,000
Unrecognized tax benefits	0		0
Federal
Income Taxes [Line Items]
Operating loss carryforwards	0		0
Unused built-in losses	53,200,000		53,200,000
State
Income Taxes [Line Items]
Operating loss carryforwards	54,700,000		54,700,000
Unused built-in losses	$ 7,500,000		$ 7,500,000