Investment Securities (Held-to-maturity Securities with Unrealized Loss) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014 securities	Dec. 31, 2013 securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$ 10,862	$ 38,209
Less than 12 months, unrealized loss	50	3,123
Less than 12 months, no. of securities	2	9
12 months or more, fair value	25,225	1,181
12 months or more, unrealized loss	1,051	133
12 months or more, no. of securities	8	1
Total fair value	36,087	39,390
Total unrealized loss	1,101	3,256
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	0	321
Less than 12 months, unrealized loss	0	12
Less than 12 months, no. of securities	0	1
12 months or more, fair value	325	0
12 months or more, unrealized loss	6	0
12 months or more, no. of securities	1	0
Total fair value	325	321
Total unrealized loss	6	12
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	10,862	31,341
Less than 12 months, unrealized loss	50	2,908
Less than 12 months, no. of securities	2	7
12 months or more, fair value	18,565	1,181
12 months or more, unrealized loss	720	133
12 months or more, no. of securities	6	1
Total fair value	29,427	32,522
Total unrealized loss	770	3,041
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	0	6,547
Less than 12 months, unrealized loss	0	203
Less than 12 months, no. of securities	0	1
12 months or more, fair value	6,335	0
12 months or more, unrealized loss	325	0
12 months or more, no. of securities	1	0
Total fair value	6,335	6,547
Total unrealized loss	$ 325	$ 203