Securities (Securities in a Continuous Unrealized Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	3	5
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 5,505	$ 6,907
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(102)	(553)
Number of securities in a continuous unrealized loss position for 12 months or longer	13	13
Fair value of securities in a continuous unrealized loss position for 12 months or longer	24,387	23,283
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(10,318)	(11,612)
Number of securities in a continuous unrealized loss position total	16	18
Fair value of securities in a continuous unrealized loss position total	29,892	30,190
Unrealized losses of securities in a continuous unrealized loss position total	(10,420)	(12,165)
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	23,620	22,396
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(7,038)	(8,243)
Number of securities in a continuous unrealized loss position total	11	11
Fair value of securities in a continuous unrealized loss position total	23,620	22,396
Unrealized losses of securities in a continuous unrealized loss position total	(7,038)	(8,243)
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	2	2
Fair value of securities in a continuous unrealized loss position for 12 months or longer	767	887
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(3,280)	(3,369)
Number of securities in a continuous unrealized loss position total	2	2
Fair value of securities in a continuous unrealized loss position total	767	887
Unrealized losses of securities in a continuous unrealized loss position total	(3,280)	(3,369)
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	3	3
Fair value of securities in a continuous unrealized loss position for less than 12 months	5,505	5,203
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(102)	(403)
Number of securities in a continuous unrealized loss position for 12 months or longer	0	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	0	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	0	0
Number of securities in a continuous unrealized loss position total	3	3
Fair value of securities in a continuous unrealized loss position total	5,505	5,203
Unrealized losses of securities in a continuous unrealized loss position total	(102)	(403)
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	3	3
Fair value of securities in a continuous unrealized loss position for less than 12 months	5,505	5,203
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(102)	(403)
Number of securities in a continuous unrealized loss position for 12 months or longer	13	13
Fair value of securities in a continuous unrealized loss position for 12 months or longer	24,387	23,283
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(10,318)	(11,612)
Number of securities in a continuous unrealized loss position total	16	16
Fair value of securities in a continuous unrealized loss position total	29,892	28,486
Unrealized losses of securities in a continuous unrealized loss position total	(10,420)	(12,015)
Perpetual preferred stock [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		1,704
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months		(150)
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		1,704
Unrealized losses of securities in a continuous unrealized loss position total		$ (150)