Newly Issued Accounting Pronouncements (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accrued Interest Receivable and Other Assets
Schedule of Equity Method Investments [Line Items]
Investments in qualified housing projects	$ 5,900		$ 5,900		$ 6,100
Accrued Interest Payable and Other Liabilities
Schedule of Equity Method Investments [Line Items]
Unfunded investment in qualified affordable housing investments	4,600		4,600		$ 4,800
Income Tax Expense
Schedule of Equity Method Investments [Line Items]
Low income housing investment tax credit (loss), amortization method	40		(80)
Low income housing investment (benefit) losses, equity method		$ (35)		$ (70)
Other Operating Expense
Schedule of Equity Method Investments [Line Items]
Low income housing investment (benefit) losses, equity method		$ 23		$ 43
FASB Issued Guidance For Qualified Housing Projects
Schedule of Equity Method Investments [Line Items]
Low income housing investment loss, due to adoption of amortization method	$ 161		$ 161