Securities (Securities in a Continuous Unrealized Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013 security	Dec. 31, 2012 security
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	6	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 35,162	$ 0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(86)	0
Number of securities in a continuous unrealized loss position for 12 months or longer	12	13
Fair value of securities in a continuous unrealized loss position for 12 months or longer	25,474	25,594
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(6,486)	(9,119)
Number of securities in a continuous unrealized loss position total	18	13
Fair value of securities in a continuous unrealized loss position total	60,636	25,594
Unrealized losses of securities in a continuous unrealized loss position total	(6,572)	(9,119)
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	4
Fair value of securities in a continuous unrealized loss position for less than 12 months	34,756
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(69)
Number of securities in a continuous unrealized loss position for 12 months or longer	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	0
Number of securities in a continuous unrealized loss position total	4
Fair value of securities in a continuous unrealized loss position total	34,756
Unrealized losses of securities in a continuous unrealized loss position total	(69)
Trust preferred securities: Individual name issuers [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	0	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	0	0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	0	0
Number of securities in a continuous unrealized loss position for 12 months or longer	11	11
Fair value of securities in a continuous unrealized loss position for 12 months or longer	25,077	24,751
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(5,619)	(5,926)
Number of securities in a continuous unrealized loss position total	11	11
Fair value of securities in a continuous unrealized loss position total	25,077	24,751
Unrealized losses of securities in a continuous unrealized loss position total	(5,619)	(5,926)
Trust preferred securities: Collateralized debt obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	0	0
Fair value of securities in a continuous unrealized loss position for less than 12 months	0	0
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	0	0
Number of securities in a continuous unrealized loss position for 12 months or longer	1	2
Fair value of securities in a continuous unrealized loss position for 12 months or longer	397	843
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(867)	(3,193)
Number of securities in a continuous unrealized loss position total	1	2
Fair value of securities in a continuous unrealized loss position total	397	843
Unrealized losses of securities in a continuous unrealized loss position total	(867)	(3,193)
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	2
Fair value of securities in a continuous unrealized loss position for less than 12 months	406
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(17)
Number of securities in a continuous unrealized loss position for 12 months or longer	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	0
Number of securities in a continuous unrealized loss position total	2
Fair value of securities in a continuous unrealized loss position total	406
Unrealized losses of securities in a continuous unrealized loss position total	$ (17)