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Securities (Details Textual) (USD $)	3 Months Ended	9 Months Ended						3 Months Ended								9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012 Other-Than-Temporarily Impaired CDO	Sep. 30, 2014 Other-Than-Temporarily Impaired CDO position	Sep. 30, 2014 Minimum [Member] Other-Than-Temporarily Impaired CDO	Sep. 30, 2014 Minimum [Member] Standard Poors [Member]	Sep. 30, 2014 Minimum [Member] Moody Investor Service [Member]	Sep. 30, 2014 Maximum [Member] Other-Than-Temporarily Impaired CDO	Sep. 30, 2014 Maximum [Member] Standard Poors [Member]	Sep. 30, 2014 Maximum [Member] Moody Investor Service [Member]	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member]	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Minimum [Member]	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Gain on sale of investments			$ 7,000
Loss on sale of investments	1,000	0						11,000
Gross unrealized losses	12,689,000	12,689,000			26,684,000
Number of positions in loss position greater than 12 months									3
Contractual balance									25,800,000
Reduced balance									15,900,000
Interest payment received									1,700,000
Cumulative OTTI charges	14,050,000	14,050,000	14,402,000	14,079,000	14,079,000	14,983,000	14,983,000		14,000,000
Other comprehensive income net									5,800,000
OTTI, portion in other comprehensive loss, net of tax, available-for-sale securities		3,500,000
Severity of OTTI (as a percent)										28.00%			93.00%
Base discount rate, which is subject to an additional margin																3 month LIBOR
Basis point spread on variable rate																	1.60%	1.80%
Amortized Cost	888,228,000	888,228,000			920,897,000				218,000
Securities available-for-sale	$ 900,110,000	$ 900,110,000			$ 914,560,000				$ 189,000
Credit Quality Indicator Pricing											47.2	3.80		87.0	87.5

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Net of tax amount of cumulative other than temporary impairment (OTTI) on a debt security, categorized as available-for-sale, recognized in other comprehensive income (loss), attributable to the parent entity.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Number of investment positions in available-for-sale investments that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

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