Investment Securities (Other Disclosures) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 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	4,700,000		4,700,000		4,300,000
Investment securities portfolio available as lendable collateral	197,100,000		197,100,000
Book value of securities sold	23,900,000	3,300,000	26,400,000	175,100,000
Gross gains	500,000	100,000	1,200,000	2,900,000
Gross losses	400,000	0	400,000	200,000
Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities portfolio pledged as collateral	116,600,000		116,600,000
Retail repurchase agreements [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities portfolio pledged as collateral	17,300,000		17,300,000
Others [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities portfolio pledged as collateral	$ 176,900,000		$ 176,900,000