Effective Income Tax Rate Reconciliation, Nondeductible Expense, Acquisition Costs, Amount

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Gross tax credits, Expiration Year

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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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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 increase (decrease) in the valuation allowance for deferred tax assets.

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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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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 tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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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 income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Income Taxes (Reconciliation of Effective Income Tax Rate) (Details) (USD $)	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 [Abstract]
Income tax expense at Federal statutory rate									$ 9,772,000	$ 4,959,000	$ 6,804,000
Tax-exempt instruments									(1,598,000)	(858,000)	(649,000)
Non-deductible acquisition costs									373,000	469,000	0
Federal tax credits									(812,000)	0	0
Effects of BOLI									(159,000)	(25,000)	(28,000)
Tax position resolution									(728,000)	0	0
Valuation allowance									0	(77,000)	77,000
Other, net									57,000	125,000	(26,000)
Income tax expense	1,328,000us-gaap_IncomeTaxExpenseBenefit	2,765,000us-gaap_IncomeTaxExpenseBenefit	1,544,000us-gaap_IncomeTaxExpenseBenefit	1,268,000us-gaap_IncomeTaxExpenseBenefit	433,000us-gaap_IncomeTaxExpenseBenefit	1,510,000us-gaap_IncomeTaxExpenseBenefit	1,292,000us-gaap_IncomeTaxExpenseBenefit	1,358,000us-gaap_IncomeTaxExpenseBenefit	6,905,000us-gaap_IncomeTaxExpenseBenefit	4,593,000us-gaap_IncomeTaxExpenseBenefit	6,178,000us-gaap_IncomeTaxExpenseBenefit
Subsidiary \| New Market Tax Credit Investments
Tax Credit Carryforward [Line Items]
Number of tranches	3								3
Tax credit	25,000,000								25,000,000
Tax credit, required funding percentage									85.00%
Subsidiary \| New Market Tax Credit Investments \| 2020
Tax Credit Carryforward [Line Items]
Tax credits subject to expiration	$ 9,800,000								$ 9,800,000
Gross tax credits, Expiration Year									2020