Securities - Securities Available for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Amortized cost
Total debt securities	$ 518,104	$ 521,337
Unrealized Gains (Losses)
Accumulated gross unrealized gain, before tax	13,044	2,853
Accumulated gross unrealized loss, before tax	(1,281)	(7,327)
Amortized Cost
Securities available for sale	529,867	516,863
U.S. Gov’t sponsored entities
Amortized cost
Total debt securities	135,215	134,010
Unrealized Gains (Losses)
Accumulated gross unrealized gain, before tax	3,620	254
Accumulated gross unrealized loss, before tax	(67)	(1,570)
Amortized Cost
Securities available for sale	138,768	132,694
State & political subdivisions
Amortized cost
Total debt securities	111,468	134,662
Unrealized Gains (Losses)
Accumulated gross unrealized gain, before tax	3,687	1,942
Accumulated gross unrealized loss, before tax	(91)	(573)
Amortized Cost
Securities available for sale	115,064	136,031
Residential & multi-family mortgage
Amortized cost
Total debt securities	236,241	209,126
Unrealized Gains (Losses)
Accumulated gross unrealized gain, before tax	5,362	500
Accumulated gross unrealized loss, before tax	(637)	(3,573)
Amortized Cost
Securities available for sale	240,966	206,053
Corporate notes & bonds
Amortized cost
Total debt securities	7,350	12,356
Unrealized Gains (Losses)
Accumulated gross unrealized gain, before tax	14	22
Accumulated gross unrealized loss, before tax	(361)	(601)
Amortized Cost
Securities available for sale	7,003	11,777
Pooled SBA
Amortized cost
Total debt securities	26,810	30,163
Unrealized Gains (Losses)
Accumulated gross unrealized gain, before tax	361	135
Accumulated gross unrealized loss, before tax	(70)	(924)
Amortized Cost
Securities available for sale	27,101	29,374
Other
Amortized cost
Total debt securities	1,020	1,020
Unrealized Gains (Losses)
Accumulated gross unrealized gain, before tax	0	0
Accumulated gross unrealized loss, before tax	(55)	(86)
Amortized Cost
Securities available for sale	$ 965	$ 934