Investment Securities (Held-to-maturity Securities with Unrealized Loss) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014 securities	Dec. 31, 2013 securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$ 31,246	$ 38,209
Less than 12 months, unrealized loss	825	3,123
Less than 12 months, no. of securities	9	9
12 months or more, fair value	10,624	1,181
12 months or more, unrealized loss	629	133
12 months or more, no. of securities	2	1
Total fair value	41,870	39,390
Total unrealized loss	1,454	3,256
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	322	321
Less than 12 months, unrealized loss	11	12
Less than 12 months, no. of securities	1	1
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Total fair value	322	321
Total unrealized loss	11	12
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	23,392	31,341
Less than 12 months, unrealized loss	542	2,908
Less than 12 months, no. of securities	6	7
12 months or more, fair value	10,624	1,181
12 months or more, unrealized loss	629	133
12 months or more, no. of securities	2	1
Total fair value	34,016	32,522
Total unrealized loss	1,171	3,041
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	7,532	6,547
Less than 12 months, unrealized loss	272	203
Less than 12 months, no. of securities	2	1
12 months or more, fair value	0	0
12 months or more, unrealized loss	0	0
12 months or more, no. of securities	0	0
Total fair value	7,532	6,547
Total unrealized loss	$ 272	$ 203