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Revenue from Contracts with Clients - Non-interest income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenue from Contracts with Clients
(Gain) loss on OREO sales, net	$ (368)	$ 78
Service Charges and other fees
Revenue from Contracts with Clients
Non-interest income	4,321	4,510
Bank card fees
Revenue from Contracts with Clients
Non-interest income	3,428	3,362
ASU 2014-09
Revenue from Contracts with Clients
Non-interest income	17,051	17,835
Contract balances	0		$ 0
ASU 2014-09 \| In-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	8,271	8,537
(Gain) loss on OREO sales, net	368	(78)
Total Revenue	7,903	8,615
ASU 2014-09 \| In-scope of Topic 606 \| Service Charges and other fees
Revenue from Contracts with Clients
Non-interest income	4,843	5,175
ASU 2014-09 \| In-scope of Topic 606 \| Bank card fees
Revenue from Contracts with Clients
Non-interest income	3,428	3,362
ASU 2014-09 \| Out-of-scope of Topic 606
Revenue from Contracts with Clients
Non-interest income	$ 8,780	$ 9,298