Investment Securities (Held-to-maturity Securities with Unrealized Loss) (Details) $ in Thousands	Sep. 30, 2016 USD ($) securities	Dec. 31, 2015 USD ($) securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$ 9,053	$ 4,246
Less than 12 months, unrealized loss	$ 7	$ 93
Less than 12 months, no. of securities | securities	1	3
12 months or more, fair value	$ 1,001	$ 16,254
12 months or more, unrealized loss	$ 21	$ 539
12 months or more, no. of securities | securities	1	4
Total fair value	$ 10,054	$ 20,500
Total unrealized loss	28	632
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value		0
Less than 12 months, unrealized loss		$ 0
Less than 12 months, no. of securities | securities		0
12 months or more, fair value		$ 319
12 months or more, unrealized loss		$ 4
12 months or more, no. of securities | securities		1
Total fair value		$ 319
Total unrealized loss	0	4
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	9,053	3,706
Less than 12 months, unrealized loss	$ 7	$ 89
Less than 12 months, no. of securities | securities	1	2
12 months or more, fair value	$ 1,001	$ 10,040
12 months or more, unrealized loss	$ 21	$ 445
12 months or more, no. of securities | securities	1	2
Total fair value	$ 10,054	$ 13,746
Total unrealized loss	28	534
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value		540
Less than 12 months, unrealized loss		$ 4
Less than 12 months, no. of securities | securities		1
12 months or more, fair value		$ 5,895
12 months or more, unrealized loss		$ 90
12 months or more, no. of securities | securities		1
Total fair value		$ 6,435
Total unrealized loss	$ 0	$ 94