Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 11,602	$ 10,938
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	948	1,016
Deferred taxes	515	385
Stock-based compensation	123	197
Excess tax benefits of stock-based compensation	93	153
Provision for loan losses	1,765	1,901
Write-downs of other real estate owned and other repossessed assets	134	64
Gains on sale of mortgage loans held for sale	(316)	(290)
Securities gains	(68)	(144)
(Gains) losses on sale of assets, net	(27)	24
Proceeds from sale of mortgage loans held for sale	13,793	13,032
Funding of mortgage loans held for sale	(15,012)	(11,983)
Amortization of securities premiums and discounts, net	563	690
Change in cash surrender value of bank owned life insurance	(385)	(395)
Mortgage servicing rights:
Fair value adjustments	421	255
New servicing assets created	(93)	(84)
Changes in:
Other assets	(2,464)	(2,052)
Other liabilities	(92)	8,277
Net cash provided by operating activities	11,500	21,984
Certificates of deposit in other banks:
Maturity of certificates of deposit	2,236	1,532
Securities available-for-sale (AFS):
Purchase of AFS securities	(3,906)	(5,755)
Proceeds from the sales of AFS securities	3,509	11,483
Proceeds from prepayments and maturities of AFS securities	19,623	12,879
Securities held-to-maturity (HTM):
Proceeds from maturities of HTM securities	0	1
Change in loans, net	(17,034)	(18,444)
Purchase of premises and equipment	(881)	(346)
Additional investment in Federal Reserve Bank stock	0	(18)
Proceeds from sale of other real estate and other repossessed assets	1,808	1,973
Additional investment in other real estate and other repossessed assets	0	(85)
Net cash provided by investing activities	5,355	3,220
Cash flows from financing activities:
Change in deposits, net	53,436	65,283
Change in repurchase agreements, federal funds purchased, and other short-term borrowings, net	10,113	10,384
Advances from Federal Home Loan Bank	0	20,000
Payments on advances from Federal Home Loan Bank	(100,028)	(80,029)
Issuance of common stock	331	270
Repurchase of common stock	(382)	(189)
Excess tax benefits of stock-based compensation	(93)	(153)
Dividends paid	(5,454)	(5,238)
Net cash provided by (used in) financing activities	(42,077)	10,328
Net increase (decrease) in cash and cash equivalents	(25,222)	35,532
Cash and cash equivalents at beginning of period	187,611	105,517
Cash and cash equivalents at end of period	162,389	141,049
Supplemental disclosures:
Income taxes paid	1,419	3,000
Interest paid	2,883	2,706
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets	1,117	1,722
Common stock dividends accrued, paid in subsequent quarter	227	221
Real estate acquired in settlement of loans	$ 1,291	$ 5,570