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Investment Securities (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	$ 329,924	$ 194,619
Investment Securities Available-for-Sale, Gross Unrealized Gains	9,497	2,271
Investment Securities Available-for-Sale, Gross Unrealized Losses	(962)	(1,120)
Investment Securities Available-for-Sale, Fair Value	338,459	195,770
Investment securities held-to-maturity
Investment Securities Held-to-Maturity, Amortized Cost		224,056
Investment Securities Held-to-Maturity, Gross Unrealized Gains		6,793
Investment Securities Held-to-Maturity, Gross Unrealized Losses		(291)
Investment Securities Held-to-Maturity, Fair Value		230,558
Total, Amortized Cost		418,675
Total, Gross Unrealized Gains		9,064
Total, Gross Unrealized Losses		(1,411)
Total, Fair Value		426,328
Federal Agency Obligations [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	55,024	29,062
Investment Securities Available-for-Sale, Gross Unrealized Gains	1,084	142
Investment Securities Available-for-Sale, Gross Unrealized Losses	(9)	(58)
Investment Securities Available-for-Sale, Fair Value	56,099	29,146
Investment securities held-to-maturity
Investment Securities Held-to-Maturity, Amortized Cost		33,616
Investment Securities Held-to-Maturity, Gross Unrealized Gains		280
Investment Securities Held-to-Maturity, Gross Unrealized Losses		(119)
Investment Securities Held-to-Maturity, Fair Value		33,777
Residential mortgage pass-through securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	62,124	44,155
Investment Securities Available-for-Sale, Gross Unrealized Gains	1,292	803
Investment Securities Available-for-Sale, Gross Unrealized Losses	(12)	(48)
Investment Securities Available-for-Sale, Fair Value	63,404	44,910
Investment securities held-to-maturity
Investment Securities Held-to-Maturity, Amortized Cost		3,805
Investment Securities Held-to-Maturity, Gross Unrealized Gains		11
Investment Securities Held-to-Maturity, Gross Unrealized Losses		(6)
Investment Securities Held-to-Maturity, Fair Value		3,810
Commercial Mortgage Backed Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	4,218	2,981
Investment Securities Available-for-Sale, Gross Unrealized Gains	151
Investment Securities Available-for-Sale, Gross Unrealized Losses		(9)
Investment Securities Available-for-Sale, Fair Value	4,369	2,972
Investment securities held-to-maturity
Investment Securities Held-to-Maturity, Amortized Cost		4,110
Investment Securities Held-to-Maturity, Gross Unrealized Gains		27
Investment Securities Held-to-Maturity, Gross Unrealized Losses		(2)
Investment Securities Held-to-Maturity, Fair Value		4,135
US States and Political Subdivisions Debt Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	135,781	8,188
Investment Securities Available-for-Sale, Gross Unrealized Gains	5,582	169
Investment Securities Available-for-Sale, Gross Unrealized Losses	(2)
Investment Securities Available-for-Sale, Fair Value	141,361	8,357
Investment securities held-to-maturity
Investment Securities Held-to-Maturity, Amortized Cost		118,015
Investment Securities Held-to-Maturity, Gross Unrealized Gains		5,001
Investment Securities Held-to-Maturity, Gross Unrealized Losses		(3)
Investment Securities Held-to-Maturity, Fair Value		123,013
Trust Preferred Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	5,574	16,088
Investment Securities Available-for-Sale, Gross Unrealized Gains	310	398
Investment Securities Available-for-Sale, Gross Unrealized Losses	(209)	(231)
Investment Securities Available-for-Sale, Fair Value	5,675	16,255
Corporate Bonds And Notes [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	37,725	53,566
Investment Securities Available-for-Sale, Gross Unrealized Gains	916	702
Investment Securities Available-for-Sale, Gross Unrealized Losses	(348)	(292)
Investment Securities Available-for-Sale, Fair Value	38,293	53,976
Investment securities held-to-maturity
Investment Securities Held-to-Maturity, Amortized Cost		36,039
Investment Securities Held-to-Maturity, Gross Unrealized Gains		719
Investment Securities Held-to-Maturity, Gross Unrealized Losses		(161)
Investment Securities Held-to-Maturity, Fair Value		36,597
Asset-backed Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	15,797	20,005
Investment Securities Available-for-Sale, Gross Unrealized Gains	1	18
Investment Securities Available-for-Sale, Gross Unrealized Losses	(296)	(298)
Investment Securities Available-for-Sale, Fair Value	15,502	19,725
Certificates of Deposit [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	973	1,895
Investment Securities Available-for-Sale, Gross Unrealized Gains	15	18
Investment Securities Available-for-Sale, Gross Unrealized Losses		(8)
Investment Securities Available-for-Sale, Fair Value	988	1,905
Equity Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	376	376
Investment Securities Available-for-Sale, Gross Unrealized Gains	52	21
Investment Securities Available-for-Sale, Gross Unrealized Losses	(3)	(23)
Investment Securities Available-for-Sale, Fair Value	425	374
Other Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	12,332	18,303
Investment Securities Available-for-Sale, Gross Unrealized Gains	94
Investment Securities Available-for-Sale, Gross Unrealized Losses	(83)	(153)
Investment Securities Available-for-Sale, Fair Value	$ 12,343	18,150
U.S. Treasury and agency securities [Member]
Investment securities held-to-maturity
Investment Securities Held-to-Maturity, Amortized Cost		28,471
Investment Securities Held-to-Maturity, Gross Unrealized Gains		755
Investment Securities Held-to-Maturity, Gross Unrealized Losses
Investment Securities Held-to-Maturity, Fair Value		$ 29,226

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