Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Effective Income Taxes Rate Reconciliation [Line Items]
Tax expense at U.S. statutory rates	$ 10,781	$ 7,922	$ 8,630
State tax expense, net of federal benefit	1,323	1,115	1,249
Other, net	396	603	178
Change in valuation allowance on loss carry forwards	0	0	(7)
Total Income Tax Provision	$ 12,500	$ 9,640	$ 10,050