Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets:
Cash and due from banks	$ 118,960	$ 119,781
Cash at Federal Reserve and other banks	140,087	107,752
Cash and cash equivalents	259,047	227,533
Investment securities:
Marketable equity securities	2,974	2,874
Available for sale debt securities	984,080	1,115,036
Held to maturity debt securities	393,449	444,936
Restricted equity securities	17,250	17,250
Loans held for sale	7,604	3,687
Loans	4,182,348	4,022,014
Allowance for loan losses	(31,537)	(32,582)
Total loans, net	4,150,811	3,989,432
Premises and equipment, net	87,424	89,347
Cash value of life insurance	117,088	117,318
Accrued interest receivable	18,205	19,412
Goodwill	220,872	220,972
Other intangible assets, net	24,988	29,280
Operating leases, right-of-use	28,957
Other assets	72,134	75,364
Total assets	6,384,883	6,352,441
Deposits:
Noninterest-bearing demand	1,777,357	1,760,580
Interest-bearing	3,518,050	3,605,886
Total deposits	5,295,407	5,366,466
Accrued interest payable	2,847	1,997
Operating lease liability	28,494
Other liabilities	87,867	83,724
Other borrowings	16,423	15,839
Junior subordinated debt	57,180	57,042
Total liabilities	5,488,218	5,525,068
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, no par value: 1,000,000 shares authorized, zero issued and outstanding at September 30, 2019 and December 31, 2018	0	0
Common stock, no par value: 50,000,000 shares authorized; 30,512,187 and 30,417,223 issued and outstanding at September 30, 2019 and December 31, 2018, respectively	543,415	541,762
Retained earnings	351,751	303,490
Accumulated other comprehensive income (loss), net of tax	1,499	(17,879)
Total shareholders’ equity	896,665	827,373
Total liabilities and shareholders’ equity	$ 6,384,883	$ 6,352,441
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	30,512,187	30,417,223
Common Stock, Shares, Outstanding (in shares)	30,512,187	30,417,223