Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 5,427	$ 12,018
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	2,267	1,527
Allocation of ESOP stock	483	245
Stock awards	808	730
Net excess tax benefit on stock compensation	(125)	(3,916)
Amortization of servicing asset	57	25
Net premium amortization in excess of discount accretion on securities	1,101	468
Net amortization of deferred costs and discounts on borrowings	65	32
Amortization of core deposit intangible	832	524
Net accretion of purchase accounting adjustments	(3,865)	(2,169)
Net amortization of deferred costs and discounts on loans	31	30
Provision for loan losses	1,371	700
Net loss on sale of other real estate owned	56	366
Write down of fixed assets held for sale to net realizable value	4	0
Net (gain) loss on sale of fixed assets	(27)	7
Net unrealized loss on equity securities	138	0
Net gain on sales of loans	(617)	(42)
Proceeds from sales of mortgage loans held for sale	247	1,949
Mortgage loans originated for sale	(170)	(639)
Increase in value of Bank Owned Life Insurance	(1,141)	(772)
Decrease (increase) in interest and dividends receivable	453	(269)
Decrease in other assets	3,758	2,691
Decrease in other liabilities	(3,454)	(1,552)
Total adjustments	2,272	(65)
Net cash provided by operating activities	7,699	11,953
Cash flows from investing activities:
Net decrease (increase) in loans receivable	67,880	(16,292)
Proceeds from sale of under performing loans	4,294	0
Purchase of loans receivable	0	(5,029)
Purchase of debt securities available-for-sale	(980)	(34,770)
Purchase of debt investment securities held-to-maturity	(2,667)	(42,497)
Purchase of equity investments	(42)	0
Purchase of mortgage-backed debt securities held-to-maturity	0	(79,984)
Proceeds from maturities and calls of investment debt securities held-to-maturity	3,715	1,375
Proceeds from sales of debt securities available-for-sale	1,137	0
Proceeds from Bank Owned Life Insurance	2,553	155
Proceeds from the redemption of restricted equity investments	23,092	60
Purchases of restricted equity investments	(36,968)	0
Proceeds from sales of other real estate owned	238	868
Purchases of premises and equipment	(1,926)	(961)
Cash consideration paid for acquisition, net of cash received	(3,743)	0
Net cash provided by (used in) investing activities	84,215	(153,379)
Cash flows from financing activities:
(Decrease) increase in deposits	(51,139)	11,204
(Decrease) increase in short-term borrowings	(27,205)	7,271
Repayments of Federal Home Loan Bank advances	(521)	(477)
Increase in advances by borrowers for taxes and insurance	818	846
Exercise of stock options	3,456	2,204
Payment of employee taxes withheld from stock awards	(467)	(956)
Dividends paid	(7,105)	(4,787)
Net cash (used in) provided by financing activities	(82,163)	15,305
Net increase (decrease) in cash and due from banks	9,751	(126,121)
Cash and due from banks at beginning of period	109,613	301,373
Cash and due from banks at end of period	119,364	175,252
Supplemental Disclosure of Cash Flow Information:
Interest	6,920	5,266
Income taxes	0	2
Non-cash activities:
Accretion of unrealized loss on securities reclassified to held-to-maturity	273	293
Net loan charge-offs	(275)	268
Transfer of loans receivable to other real estate owned	373	318
Non-cash assets acquired:
Securities	254,522	0
Restricted equity investments	16,967	0
Loans	1,517,947	0
Premises and equipment	20,301	0
Accrued interest receivable	5,621	0
Bank Owned Life Insurance	85,238	0
Deferred tax asset	58,352	0
Other assets	5,262	0
Goodwill and other intangible assets, net	198,915	0
Total non-cash assets acquired	2,163,125	0
Liabilities assumed:
Deposits	1,616,073	0
Borrowings	127,747	0
Other liabilities	13,007	0
Total liabilities assumed	1,756,827	0
Mortgage-backed Securities
Cash flows from investing activities:
Principal repayments on held-to-maturity securities	25,797	23,696
Debt Securities
Cash flows from investing activities:
Principal repayments on held-to-maturity securities	$ 1,835	$ 0