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Income Taxes (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Effective Income Taxes Rate Reconciliation [Line Items]
Tax expense at U.S. statutory rates									$ 7,922	$ 8,630	$ 8,894
State tax expense, net of federal benefit									1,115	1,249	1,192
Other, net									603	178	105
Change in valuation allowance on loss carry forwards									0	(7)	(51)
Income Tax Benefit Continuing Operations									9,640	10,050	10,140
Discontinued operations									0	0	148
Income tax provision	$ 2,450	$ 2,599	$ 3,141	$ 1,450	$ 3,050	$ 2,180	$ 3,193	$ 1,627	$ 9,640	$ 10,050	$ 9,992

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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