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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to captive insurance.

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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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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Line Items]
Tax expense at statutory rate (35%)									$ 11,709	$ 11,030	$ 9,337
Increases (decreases) in taxes from:
State income tax - net of federal tax benefit									94	4	(32)
Tax exempt interest income, net of TEFRA									(1,152)	(1,043)	(1,047)
Bank owned life insurance									(816)	(449)	(374)
Captive insurance									(390)	(415)	0
Other									(282)	151	128
Totals	$ 1,957us-gaap_IncomeTaxExpenseBenefit	$ 2,773us-gaap_IncomeTaxExpenseBenefit	$ 2,254us-gaap_IncomeTaxExpenseBenefit	$ 2,179us-gaap_IncomeTaxExpenseBenefit	$ 1,992us-gaap_IncomeTaxExpenseBenefit	$ 2,445us-gaap_IncomeTaxExpenseBenefit	$ 2,535us-gaap_IncomeTaxExpenseBenefit	$ 2,306us-gaap_IncomeTaxExpenseBenefit	$ 9,163us-gaap_IncomeTaxExpenseBenefit	$ 9,278us-gaap_IncomeTaxExpenseBenefit	$ 8,012us-gaap_IncomeTaxExpenseBenefit