Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 65,124	$ 45,200
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	6,448	6,581
Allocation of ESOP stock	1,182	1,249
Stock awards	3,140	2,530
Net excess tax benefit on stock compensation	(243)	(722)
Amortization of servicing asset	33	86
Net premium amortization in excess of discount accretion on securities	2,387	2,988
Net amortization of deferred costs on borrowings	161	196
Amortization of core deposit intangible	3,029	2,828
Net accretion of purchase accounting adjustments	(10,588)	(12,807)
Net amortization of deferred costs and discounts on loans	1,028	493
Provision for loan losses	1,281	2,984
Net loss on sale and write-down of other real estate owned	20	1,949
Write down of fixed assets held for sale to net realizable value	7,289	3,744
Net gain on sale of fixed assets	(27)	(26)
Net unrealized (gain) loss on equity securities	(330)	282
Net gain on sales of loans	(15)	(654)
Proceeds from sales of mortgage loans held for sale	912	2,053
Mortgage loans originated for sale	(1,007)	(2,503)
Increase in value of Bank Owned Life Insurance	(4,045)	(3,813)
Net loss (gain) on sale of assets held for sale	5	(1,166)
Increase in interest and dividends receivable	(462)	(947)
Deferred tax provision	336	0
(Increase) decrease in other assets	(27,786)	13,452
Increase (decrease) in other liabilities	34,110	(1,744)
Total adjustments	16,858	17,033
Net cash provided by operating activities	81,982	62,233
Cash flows from investing activities:
Net (increase) decrease in loans receivable	(92,658)	85,935
Proceeds from sale of under performing loans	5,901	8,724
Purchase of loans receivable	(101,674)	(147,563)
Purchase of debt investment securities available-for-sale	(35,106)	(28,010)
Purchase of debt investment securities held-to-maturity	(3,577)	(4,017)
Purchase of equity investments	(160)	(138)
Proceeds from maturities and calls of debt investment securities available-for-sale	28,447	14,001
Proceeds from maturities and calls of debt investment securities held-to-maturity	25,547	38,540
Proceeds from Bank Owned Life Insurance	716	2,708
Proceeds from the redemption of restricted equity investments	85,894	83,806
Purchases of restricted equity investments	(90,892)	(104,408)
Proceeds from sales of other real estate owned	2,060	646
Proceeds from sales of assets held for sale	412	7,488
Purchases of premises and equipment	(3,245)	(10,424)
Cash consideration received (paid) for acquisition, net of cash received	59,395	(3,743)
Net cash (used in) provided by investing activities	(28,324)	37,968
Cash flows from financing activities:
Decrease in deposits	(42,306)	(103,522)
Increase in short-term borrowings	107,307	122,376
Proceeds from Federal Home Loan Bank advances	35,000	0
Repayments of Federal Home Loan Bank advances	(76,618)	(56,607)
Repayments of other borrowings	(216)	(342)
Increase in advances by borrowers for taxes and insurance	2,164	5,498
Exercise of stock options	1,145	4,936
Payment of employee taxes withheld from stock awards	(2,786)	(3,235)
Purchase of treasury stock	(18,054)	0
Acquisition of common stock by ESOP	0	(8,400)
Dividends paid	(25,943)	(21,425)
Net cash used in financing activities	(20,307)	(60,721)
Net increase in cash and due from banks and restricted cash	33,351	39,480
Supplemental Disclosure of Cash Flow Information:
Cash and due from banks at beginning of period	120,792	109,613
Cash and due from banks and restricted cash at beginning of period	122,328	109,613
Restricted cash at beginning of period	1,536	0
Cash and due from banks at end of period	140,901	148,362
Restricted cash at end of period	14,778	731
Cash and due from banks and restricted cash at end of period	155,679	149,093
Cash paid during the period for:
Interest	39,293	26,637
Income taxes	16,506	143
Accretion of unrealized loss on securities reclassified to held-to-maturity	629	2,690
Net loan charge-offs	1,222	1,884
Transfer of premises and equipment to assets held-for-sale	1,607	11,092
Transfer of loans receivable to other real estate owned	993	640
Non-cash assets acquired:
Securities	103,775	254,522
Restricted equity investments	313	16,967
Loans	307,778	1,517,172
Premises and equipment	3,389	19,892
Accrued interest receivable	1,390	5,621
Bank Owned Life Insurance	10,460	85,238
Deferred tax asset	3,829	57,712
Other assets	1,405	5,246
Goodwill and other intangible assets, net	38,780	199,500
Total non-cash assets acquired	471,119	2,161,870
Liabilities assumed:
Deposits	449,018	1,616,073
Borrowings	0	127,747
Other liabilities	5,015	11,752
Total liabilities assumed	454,033	1,755,572
Debt Securities
Cash flows from investing activities:
Principal repayments on debt mortgage-backed securities held-to-maturity	1,334	2,706
Mortgage-backed Securities Held-to-Maturity
Cash flows from investing activities:
Principal repayments on debt mortgage-backed securities held-to-maturity	$ 89,282	$ 91,717