Securities (Securities in a Continuous Unrealized Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014 security	Dec. 31, 2013 security
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	3	10
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 20,952	$ 87,064
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(54)	(550)
Number of securities in a continuous unrealized loss position for 12 months or longer	12	11
Fair value of securities in a continuous unrealized loss position for 12 months or longer	25,973	24,684
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(4,982)	(6,031)
Number of securities in a continuous unrealized loss position total	15	21
Fair value of securities in a continuous unrealized loss position total	46,925	111,748
Unrealized losses of securities in a continuous unrealized loss position total	(5,036)	(6,581)
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	3	1
Fair value of securities in a continuous unrealized loss position for less than 12 months	20,952	9,909
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	(54)	(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	3	1
Fair value of securities in a continuous unrealized loss position total	20,952	9,909
Unrealized losses of securities in a continuous unrealized loss position total	(54)	(79)
Mortgage-backed securities issued by U.S. government-sponsored agencies and U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months		7
Fair value of securities in a continuous unrealized loss position for less than 12 months		76,748
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months		(455)
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		7
Fair value of securities in a continuous unrealized loss position total		76,748
Unrealized losses of securities in a continuous unrealized loss position total		(455)
Trust preferred securities: Individual name issuers [Member]
Schedule of Available for Sale and Held to Maturity 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	25,774	24,684
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(4,979)	(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	25,774	24,684
Unrealized losses of securities in a continuous unrealized loss position total	(4,979)	(6,031)
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months	0	2
Fair value of securities in a continuous unrealized loss position for less than 12 months	0	407
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	0	(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	199	0
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	(3)	0
Number of securities in a continuous unrealized loss position total	1	2
Fair value of securities in a continuous unrealized loss position total	199	407
Unrealized losses of securities in a continuous unrealized loss position total	$ (3)	$ (16)