Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 22,818	$ 23,168
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,023	1,909
Deferred taxes	123	515
Stock-based compensation	302	235
Excess tax benefits of stock-based compensation	0	93
Provision for loan losses	3,993	3,638
Write-downs of other real estate owned and other repossessed assets	1,987	224
Gains on sale of mortgage loans held for sale	(507)	(762)
Securities gains	(10)	(64)
Gain on debt repurchase	(560)	0
Losses on sale of assets, net	10	75
Proceeds from sale of mortgage loans held for sale	22,859	34,372
Funding of mortgage loans held for sale	(25,732)	(34,145)
Amortization of securities premiums and discounts, net	1,551	1,016
Change in cash surrender value of bank owned life insurance	(708)	(758)
Mortgage servicing rights:
Fair value adjustments	301	660
New servicing assets created	(172)	(221)
Changes in:
Other assets	(1,966)	(3,371)
Other liabilities	2,756	(1,813)
Net cash provided by operating activities	29,068	24,771
Certificates of deposit in other banks:
Purchase of certificates of deposit	(11,515)	0
Maturity of certificates of deposit	235	2,732
Securities available-for-sale (AFS):
Purchase of AFS securities	(77,344)	(30,274)
Proceeds from the sales of AFS securities	3,261	3,509
Proceeds from prepayments and maturities of AFS securities	70,304	49,693
Securities held-to-maturity (HTM):
Proceeds from maturities of HTM securities	8	0
Change in loans, net	(151,624)	(62,493)
Purchase of premises and equipment	(1,187)	(1,746)
Proceeds from sale and retirement of premises and equipment	25	10
Proceeds from sale of other real estate and other repossessed assets	1,128	3,713
Net cash used in investing activities	(166,709)	(34,856)
Cash flows from financing activities:
Change in deposits, net	24,302	61,201
Change in repurchase agreements, federal funds purchased, and other short-term borrowings, net	8,547	10,811
Proceeds from Federal Home Loan Bank advances	100,000	0
Payments on advances from Federal Home Loan Bank	(50)	(100,057)
Repurchase of long-term debt	(1,440)	0
Issuance of common stock	708	560
Repurchase of common stock	0	(382)
Excess tax benefits of stock-based compensation	0	(93)
Dividends paid	(11,312)	(10,916)
Net cash provided by (used in) financing activities	120,755	(38,876)
Net decrease in cash and cash equivalents	(16,886)	(48,961)
Cash and cash equivalents at beginning of period	144,716	187,611
Cash and cash equivalents at end of period	127,830	138,650
Supplemental disclosures:
Income taxes paid	6,400	11,279
Interest paid	6,912	5,763
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets	1,574	2,257
Common stock dividends accrued, paid in subsequent quarter	204	208
Real estate acquired in settlement of loans	$ 1,434	$ 3,292