Net Deferred Tax Asset and Income Taxes (Schedule of Components of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current tax expense:
Federal	$ 13,518	$ 13,937	$ 13,227
State	742	533	558
Total current tax expense	14,260	14,470	13,785
Deferred tax expense (benefit):
Federal	2,300	1,310	(789)
State	(33)	18	(74)
Total deferred tax expense (benefit)	2,267	1,328	(863)
Total income tax expense	$ 16,527	$ 15,798	$ 12,922

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.