Fair Value (Fair Value, by Balance Sheet Grouping) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	$ 494,819	$ 310,262
Held-to-maturity	142,272	142,260
MSRs	2,348	2,186	$ 2,248
Interest rate swap derivatives	5,239
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	0	0
Interest rate swap derivatives	0	0
Interest rate swap derivatives	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	494,819	310,262
Interest rate swap derivatives	5,239	8,646
Interest rate swap derivatives	5,239	8,646
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	0	0
Interest rate swap derivatives	0	0
Interest rate swap derivatives	0	0
Carrying value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	72,577	77,805
Estimated fair value	494,819	310,262
Held-to-maturity	140,557	139,424
FHLB stock	3,268	3,000
Loans held-for-sale	8,651	3,621
Loans, net	2,077,358	1,662,095
BOLI	56,957	54,450
MSRs		2,186
Interest rate swap derivatives		8,646
Deposits	2,661,813	2,083,088
Interest rate swap derivatives	5,239	8,646
Estimated fair value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	72,577	77,805
Estimated fair value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	494,819	310,262
Held-to-maturity	142,272	142,260
FHLB stock	3,268	3,000
Loans held-for-sale	8,651	3,621
Interest rate swap derivatives	5,239	8,646
Deposits	2,661,045	2,082,748
Interest rate swap derivatives	5,239	8,646
Estimated fair value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net	2,064,937	1,656,986
BOLI	56,957	54,450
MSRs	$ 3,321	$ 3,027