Securities (Securities in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Mar. 31, 2016 USD ($) security	Dec. 31, 2015 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	2	16
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 10,465	$ 97,766
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ (36)	$ (858)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	10	10
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 23,081	$ 25,138
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (6,743)	$ (4,677)
Number of securities in a continuous unrealized loss position total | security	12	26
Fair value of securities in a continuous unrealized loss position total	$ 33,546	$ 122,904
Unrealized losses of securities in a continuous unrealized loss position total	$ (6,779)	$ (5,535)
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 | security	1	4
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 9,974	$ 34,767
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ (26)	$ (388)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	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 | security	1	4
Fair value of securities in a continuous unrealized loss position total	$ 9,974	$ 34,767
Unrealized losses of securities in a continuous unrealized loss position total	$ (26)	$ (388)
Mortgage-backed securities issued by U.S. government-sponsored agencies and 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 | security		9
Fair value of securities in a continuous unrealized loss position for less than 12 months		$ 61,764
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months		$ (450)
Number of securities in a continuous unrealized loss position for 12 months or longer | security		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 | security		9
Fair value of securities in a continuous unrealized loss position total		$ 61,764
Unrealized losses of securities in a continuous unrealized loss position total		$ (450)
Individual name issuer trust preferred debt securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in a continuous unrealized loss position for less than 12 months | security	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 | security	10	10
Fair value of securities in a continuous unrealized loss position for 12 months or longer	$ 23,081	$ 25,138
Unrealized losses of securities in a continuous unrealized loss position for 12 months or longer	$ (6,743)	$ (4,677)
Number of securities in a continuous unrealized loss position total | security	10	10
Fair value of securities in a continuous unrealized loss position total	$ 23,081	$ 25,138
Unrealized losses of securities in a continuous unrealized loss position total	$ (6,743)	$ (4,677)
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 | security	1	3
Fair value of securities in a continuous unrealized loss position for less than 12 months	$ 491	$ 1,235
Unrealized losses of securities in a continuous unrealized loss position for less than 12 months	$ (10)	$ (20)
Number of securities in a continuous unrealized loss position for 12 months or longer | security	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 | security	1	3
Fair value of securities in a continuous unrealized loss position total	$ 491	$ 1,235
Unrealized losses of securities in a continuous unrealized loss position total	$ (10)	$ (20)