Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Net income	$ 63,792	$ 23,016	$ 36,036
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	7,193	2,618	4,326
Depreciation of premises and equipment	6,610	5,551	5,630
Loss on disposal of premises and equipment	1,627	0	0
Net amortization of investment premiums and discounts	3,044	2,990	3,200
Net (gain) loss on sale of investment securities available for sale	(7)	(101)	77
Net gain on sale of loans	(3,283)	(2,441)	(3,048)
Stock-based compensation	2,750	2,068	1,713
Amortization and net impairment of mortgage servicing rights	830	744	880
Net accretion of fair value adjustments	(9,883)	(2,376)	(3,776)
Amortization of intangible assets	3,656	2,734	3,498
Impairment of other real estate owned (OREO) and other repossessed assets	89	208	94
Net (gain) loss on sale of OREO	(295)	104	76
Net increase in cash surrender value of bank owned life insurance (BOLI)	(1,177)	(838)	(908)
Other, net	532	(788)	79
Loans originated for resale	(86,323)	(125,482)	(161,597)
Proceeds from loans sold	91,353	132,639	162,762
Provision for deferred income taxes	9,839	20,418	1,676
Settlement of pension liability acquired in RBPI Merger	0	(15,233)	0
Change in income taxes payable/receivable	415	(7,917)	4,340
Change in accrued interest receivable	1,661	(3,178)	(664)
Change in accrued interest payable	3,125	(2,023)	883
Change in other assets	(19,222)	(3,471)	865
Change in other liabilities	2,909	3,690	(1,914)
Net cash provided by operating activities	79,235	32,932	54,228
Investing activities:
Purchases of investment securities available for sale	(338,421)	(445,294)	(350,669)
Purchases of investment securities held to maturity	(1,328)	(5,189)	(2,928)
Proceeds from maturity and paydowns of investment securities available for sale	278,895	283,545	65,176
Proceeds from maturity and paydowns of investment securities held to maturity	532	108	34
Proceeds from sale of investment securities available for sale	7	130,858	276
Net change in FHLB stock	5,553	(2,778)	(4,363)
Proceeds from calls of investment securities	810	25,682	60,840
Proceeds from sales of other investments	0	0	664
Net change in other investments	(4,056)	2,059	264
Purchase of portfolio loans and leases	(14,974)	0	0
Net portfolio loan and lease originations	(127,589)	(180,869)	(266,331)
Purchases of premises and equipment	(19,426)	(8,304)	(2,207)
Acquisitions, net of cash acquired	(380)	12,301	0
Proceeds from sale of OREO	525	1,048	1,806
Net cash used in investing activities	(220,218)	(186,984)	(497,438)
Financing activities:
Change in deposits	226,598	201,015	327,169
Change in short-term borrowings	14,502	18,714	109,995
Dividends paid	(19,289)	(14,799)	(13,961)
Change in long-term FHLB advances and other borrowings	(83,872)	(110,049)	(65,000)
Payment of contingent consideration for business combinations	(660)	(642)	(627)
Net proceeds from issuance of subordinated notes	0	68,829	0
Cash payments to taxing authorities on employees' behalf from shares withheld from stock-based compensation	(1,639)	(1,140)	(745)
Net proceeds from sale of (purchase of) treasury stock for deferred compensation plans	2
Net proceeds from sale of (purchase of) treasury stock for deferred compensation plans		(115)	(133)
Repurchase of warrants from U.S. Treasury	(1,755)	0	0
Net purchase of treasury stock through publicly announced plans	(5,936)	0	(7,971)
Proceeds from exercise of stock options	1,464	1,498	2,181
Net cash provided by financing activities	129,415	163,311	350,908
Change in cash and cash equivalents	(11,568)	9,259	(92,302)
Cash and cash equivalents at beginning of period	60,024	50,765	143,067
Cash and cash equivalents at end of period	48,456	60,024	50,765
Supplemental cash flow information:
Income taxes	3,449	21,632	12,261
Interest	28,453	13,639	9,872
Non-cash information:
Change in other comprehensive loss	(3,099)	(1,223)	(1,997)
Change in deferred tax due to change in comprehensive income	(823)	(659)	(1,074)
Transfer of loans to other real estate owned and repossessed assets	372	342	546
Issuance of shares, warrants and options for acquisitions	0	138,509	0
Acquisition of noncash assets and liabilities:
Assets acquired	1,096	849,610	0
Liabilities assumed	687	724,085	0
Customer relationships
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of intangible assets	1,711	1,555
Investing activities:
Purchase of intangible assets	(366)	0	0
Domain name
Investing activities:
Purchase of intangible assets	$ 0	$ (151)	$ 0