Securities (Securities in a Continuous Unrealized Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014 security	Dec. 31, 2013 security
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	9	10
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 73,364	$ 87,064
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(239)	(550)
Number of securities in a continuous unrealized loss position for 12 months or longer	13	11
Fair value of securities in a continuous unrealized loss position for 12 months or longer	28,307	24,684
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(3,563)	(6,031)
Number of securities in a continuous unrealized loss position total	22	21
Fair value of securities in a continuous unrealized loss position total	101,671	111,748
Unrealized losses of securities in a continuous unrealized loss position total	(3,802)	(6,581)
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	1
Fair value of securities in a continuous unrealized loss position for less than 12 months	30,919	9,909
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(89)	(79)
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	4	1
Fair value of securities in a continuous unrealized loss position total	30,919	9,909
Unrealized losses of securities in a continuous unrealized loss position total	(89)	(79)
Mortgage-backed securities issued by US 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	7
Fair value of securities in a continuous unrealized loss position for less than 12 months	42,231	76,748
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(147)	(455)
Number of securities in a continuous unrealized loss position for 12 months or longer	1	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	912	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(13)	0
Number of securities in a continuous unrealized loss position total	5	7
Fair value of securities in a continuous unrealized loss position total	43,143	76,748
Unrealized losses of securities in a continuous unrealized loss position total	(160)	(455)
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	27,197	24,684
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(3,546)	(6,031)
Number of securities in a continuous unrealized loss position total	11	11
Fair value of securities in a continuous unrealized loss position total	27,197	24,684
Unrealized losses of securities in a continuous unrealized loss position total	(3,546)	(6,031)
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	1	2
Fair value of securities in a continuous unrealized loss position for less than 12 months	214	407
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(3)	(16)
Number of securities in a continuous unrealized loss position for 12 months or longer	1	0
Fair value of securities in a continuous unrealized loss position for 12 months or longer	198	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(4)	0
Number of securities in a continuous unrealized loss position total	2	2
Fair value of securities in a continuous unrealized loss position total	412	407
Unrealized losses of securities in a continuous unrealized loss position total	$ (7)	$ (16)