Investment Securities (Other Disclosures) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
FHLB stock	$ 5,100,000		$ 5,100,000		$ 5,900,000
FRBR stock	4,400,000		4,400,000		4,300,000
Investment securities portfolio available as lendable collateral	354,300,000		354,300,000
Book value of securities sold	21,400,000	25,700,000	2,500,000	171,800,000
Gain on securities sold	720,000	345,000	720,000	2,723,000
Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities portfolio pledged as collateral	98,200,000		98,200,000
Retail repurchase agreements [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities portfolio pledged as collateral	17,900,000		17,900,000
Others [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities portfolio pledged as collateral	$ 75,700,000		$ 75,700,000