Investment Securities (Gross Unrealized Losses and Fair Value by Length of Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	$ 76,693	$ 112,803
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	615	1,616
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	8,883	9,208
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	247	263
Available-for-sale securities, continuous unrealized loss position, fair value	85,576	122,011
Available-for-sale securities, continuous unrealized loss position, unrealized losses	862	1,879
Equity [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	648	640
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	7	12
Available-for-sale securities, continuous unrealized loss position, fair value	648	640
Available-for-sale securities, continuous unrealized loss position, unrealized losses	7	12
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	26,948	11,926
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	74	58
Available-for-sale securities, continuous unrealized loss position, fair value	26,948	11,926
Available-for-sale securities, continuous unrealized loss position, unrealized losses	74	58
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	49,097	100,237
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	534	1,546
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	8,883	9,208
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	247	263
Available-for-sale securities, continuous unrealized loss position, fair value	57,980	109,445
Available-for-sale securities, continuous unrealized loss position, unrealized losses	$ 781	$ 1,809