Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Taxes [Line Items]
Effective income tax rate	33.30%	35.40%	33.40%	34.20%
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	54,600,000		54,600,000
Unused built-in losses	$ 7,500,000		$ 7,500,000