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Securities - Schedule of Information Pertaining to Debt Securities with Gross Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 226,548	$ 102,770
Less than 12 Months, Unrealized Losses	(2,120)	(498)
12 Months or More, Fair Value	53,254	58,540
12 Months or More, Unrealized Losses	(1,189)	(938)
Total, Fair Value	279,802	161,310
Total, Unrealized Losses	(3,309)	(1,436)
U.S. Government Agency Obligations
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	62,335	47,605
Less than 12 Months, Unrealized Losses	(685)	(166)
12 Months or More, Fair Value	32,439	40,053
12 Months or More, Unrealized Losses	(643)	(551)
Total, Fair Value	94,774	87,658
Total, Unrealized Losses	(1,328)	(717)
U.S. Treasury Notes
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	1,905	1,934
Less than 12 Months, Unrealized Losses	(47)	(6)
Total, Fair Value	1,905	1,934
Total, Unrealized Losses	(47)	(6)
Mortgage-backed Securities, Residential
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	12,554	10,349
Less than 12 Months, Unrealized Losses	(349)	(21)
12 Months or More, Fair Value	5,782	6,200
12 Months or More, Unrealized Losses	(292)	(159)
Total, Fair Value	18,336	16,549
Total, Unrealized Losses	(641)	(180)
Asset Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	110	4,898
Less than 12 Months, Unrealized Losses	(2)	(85)
12 Months or More, Fair Value	4,967
12 Months or More, Unrealized Losses	(32)
Total, Fair Value	5,077	4,898
Total, Unrealized Losses	(34)	(85)
State and Municipal
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	100,141	32,257
Less than 12 Months, Unrealized Losses	(804)	(216)
12 Months or More, Fair Value	9,917	12,138
12 Months or More, Unrealized Losses	(221)	(227)
Total, Fair Value	110,058	44,395
Total, Unrealized Losses	(1,025)	(443)
Corporate Bonds
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	45,583	4,073
Less than 12 Months, Unrealized Losses	(144)	(2)
12 Months or More, Fair Value	149	149
12 Months or More, Unrealized Losses	(1)	(1)
Total, Fair Value	45,732	4,222
Total, Unrealized Losses	(145)	(3)
SBA Pooled Securities
Schedule Of Available For Sale Securities [Line Items]
Less than 12 Months, Fair Value	3,920	1,654
Less than 12 Months, Unrealized Losses	(89)	(2)
Total, Fair Value	3,920	1,654
Total, Unrealized Losses	(89)	(2)
CLO Securities
Held to maturity securities:
Less than 12 Months, Fair Value		1,835
Less than 12 Months, Unrealized Losses		(28)
12 Months or More, Fair Value	4,812	5,692
12 Months or More, Unrealized Losses	(539)	(1,002)
Total, Fair Value	4,812	7,527
Total, Unrealized Losses	$ (539)	$ (1,030)

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