Investment Securities, Available-for-sale Securities, Transaction Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses [Abstract]
Proceeds from sales	$ 42,228	$ 0	$ 42,228	$ 118,560
Proceeds from calls	45,648	31,704	226,271	237,118
Gross realized gains	376	0	382	1,514
Gross realized losses	0	0	0	80
Income tax expense recognized on net gains on sales and calls of securities available for sale	$ 151	$ 0	$ 153	$ 574