Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets:
Cash and due from banks	$ 74,476	$ 76,915
Cash at Federal Reserve and other banks	295,203	521,453
Cash and cash equivalents	369,679	598,368
Investment securities:
Available for sale	84,962	104,647
Held to maturity	443,509	240,504
Restricted equity securities	11,582	9,163
Loans held for sale	2,724	2,270
Loans	1,765,871	1,672,007
Allowance for loan losses	(37,920)	(38,245)
Total loans, net	1,727,951	1,633,762
Foreclosed assets, net	5,096	6,262
Premises and equipment, net	32,181	31,612
Cash value of life insurance	53,596	52,309
Accrued interest receivable	6,862	6,516
Goodwill	15,519	15,519
Other intangible assets, net	726	883
Mortgage servicing rights	5,985	6,165
Other assets	34,571	36,086
Total assets	2,794,943	2,744,066
Deposits:
Noninterest-bearing demand	762,452	789,458
Interest-bearing	1,674,904	1,621,025
Total deposits	2,437,356	2,410,483
Accrued interest payable	753	938
Reserve for unfunded commitments	2,220	2,415
Other liabilities	33,331	31,711
Other borrowings	12,665	6,335
Junior subordinated debt	41,238	41,238
Total liabilities	2,527,563	2,493,120
Commitments and contingencies (Note 18)
Shareholders' equity:
Common stock, no par value: 50,000,000 shares authorized; issued and outstanding: 16,139,414 at September 30, 2014 16,076,662 at December 31, 2013	92,692	89,356
Retained earnings	172,892	159,733
Accumulated other comprehensive income, net of tax	1,796	1,857
Total shareholders' equity	267,380	250,946
Total liabilities and shareholders' equity	$ 2,794,943	$ 2,744,066