Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 23,168	$ 23,340
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,909	2,027
Deferred taxes	515	396
Stock-based compensation	235	387
Excess tax benefits of stock-based compensation	93	148
Provision for loan losses	3,638	4,220
Write-downs of other real estate owned and other repossessed assets	224	363
Gains on sale of mortgage loans held for sale	(762)	(1,113)
Securities gains	(64)	(130)
Losses on sale of assets, net	75	15
Proceeds from sale of mortgage loans held for sale	34,372	42,455
Funding of mortgage loans held for sale	(34,145)	(41,071)
Amortization of securities premiums and discounts, net	1,016	1,372
Change in cash surrender value of bank owned life insurance	(758)	(793)
Mortgage servicing rights:
Fair value adjustments	660	30
New servicing assets created	(221)	(297)
Changes in:
Other assets	(3,371)	(9,372)
Other liabilities	(1,813)	(4,204)
Net cash provided by operating activities	24,771	17,773
Certificates of deposit in other banks:
Maturity of certificates of deposit	2,732	1,532
Securities available-for-sale (AFS):
Purchase of AFS securities	(30,274)	(13,816)
Proceeds from the sales of AFS securities	3,509	40,944
Proceeds from prepayments and maturities of AFS securities	49,693	30,512
Securities held-to-maturity (HTM):
Proceeds from maturities of HTM securities	0	1
Change in loans, net	(62,493)	(66,589)
Purchase of premises and equipment	(1,746)	(1,067)
Proceeds from sale and retirement of premises and equipment	10	23
Additional investment in Federal Reserve Bank stock	0	(18)
Proceeds from sale of other real estate and other repossessed assets	3,713	4,015
Additional investment in other real estate and other repossessed assets	0	(85)
Net cash used in investing activities	(34,856)	(4,548)
Cash flows from financing activities:
Change in deposits, net	61,201	38,814
Change in repurchase agreements, federal funds purchased, and other short-term borrowings, net	10,811	7,769
Advances from Federal Home Loan Bank	0	70,000
Payments on advances from Federal Home Loan Bank	(100,057)	(80,058)
Issuance of common stock	560	593
Repurchase of common stock	(382)	(189)
Excess tax benefits of stock-based compensation	(93)	(148)
Dividends paid	(10,916)	(10,492)
Net cash provided by (used in) financing activities	(38,876)	26,289
Net increase (decrease) in cash and cash equivalents	(48,961)	39,514
Cash and cash equivalents at beginning of period	187,611	105,517
Cash and cash equivalents at end of period	138,650	145,031
Supplemental disclosures:
Income taxes paid	11,279	12,475
Interest paid	5,763	5,337
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets	2,257	2,165
Common stock dividends accrued, paid in subsequent quarter	208	214
Real estate acquired in settlement of loans	$ 3,292	$ 5,969