Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets:
Cash and due from banks	$ 81,086	$ 73,652
Cash at Federal Reserve and other banks	667,813	563,623
Cash and cash equivalents	748,899	637,275
Securities available-for-sale	163,027	229,223
Restricted equity securities	9,647	10,610
Loans held for sale	12,053	10,219
Loans	1,564,823	1,551,032
Allowance for loan losses	(42,648)	(45,914)
Total loans, net	1,522,175	1,505,118
Foreclosed assets, net	7,498	16,332
Premises and equipment, net	26,985	19,893
Cash value of life insurance	50,582	50,403
Accrued interest receivable	6,636	7,312
Goodwill	15,519	15,519
Other intangible assets, net	1,092	1,301
Mortgage servicing rights	4,552	4,603
Indemnification asset	1,997	4,405
Other assets	38,607	43,384
Total assets	2,609,269	2,555,597
Deposits:
Noninterest-bearing demand	684,833	541,276
Interest-bearing	1,604,869	1,649,260
Total deposits	2,289,702	2,190,536
Accrued interest payable	1,036	1,674
Reserve for unfunded commitments	3,615	2,740
Other liabilities	35,122	30,427
Other borrowings	9,197	72,541
Junior subordinated debt	41,238	41,238
Total liabilities	2,379,910	2,339,156
Commitments and contingencies (Note 18)
Shareholders' equity:
Common stock, no par value: 50,000,000 shares authorized; issued and outstanding: 16,000,838 at December 31, 2012, 15,978,958 at December 31, 2011	85,561	84,079
Retained earnings	141,639	128,551
Accumulated other comprehensive income, net of tax	2,159	3,811
Total shareholders' equity	229,359	216,441
Total liabilities and shareholders' equity	$ 2,609,269	$ 2,555,597