Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Effective Incomes Taxes Rate Reconciliation [Line Items]
Tax expense at U.S. statutory rates									$ 8,894	$ 10,486	$ 7,260
State tax expense, net of federal benefit									1,192	1,356	1,116
Other, net									105	42	69
Change in valuation allowance on loss carry forwards									(51)	(34)	(15)
Income Tax Benefit Continuing Operations									10,140	11,850	8,430
Discontinued operations									148	(89)	(174)
Income tax provision	$ 2,230	$ 2,820	$ 3,130	$ 1,812	$ 3,489	$ 3,227	$ 3,438	$ 1,785	$ 9,992	$ 11,939	$ 8,604