Investment Securities (Gross Unrealized Losses and Fair Value by Length of Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	$ 6,998	$ 62,862
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	1	385
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	10,766	21,263
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	213	467
Available-for-sale securities, continuous unrealized loss position, fair value	17,764	84,125
Available-for-sale securities, continuous unrealized loss position, unrealized losses	214	852
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	3,005	18,981
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses		57
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	111	133
Available-for-sale securities, continuous unrealized loss position, fair value	3,005	18,981
Available-for-sale securities, continuous unrealized loss position, unrealized losses	111	190
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, fair value		2,515
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, unrealized losses		60
Held-to-maturity securities, continuous unrealized loss position, fair value		2,515
Held-to-maturity securities, continuous unrealized loss position, unrealized losses		60
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	3,993	43,881
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	1	328
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	10,766	21,263
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	102	334
Available-for-sale securities, continuous unrealized loss position, fair value	14,759	65,144
Available-for-sale securities, continuous unrealized loss position, unrealized losses	$ 103	$ 662