Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 14,931	$ 30,890
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangibles	2,494	2,454
Provision for credit losses	14,717	200
Provision for credit loss for off-balance sheet credit exposure	1,000	0
Deferred tax (benefit) expense	(1,492)	3,184
Amortization of operating lease right-of-use assets	2,130	2,050
Income on Bank-owned life insurance	(787)	(1,696)
Net amortization of premiums and discounts on securities	1,913	1,756
Accretion of net deferred loan fees	(1,521)	(1,220)
Amortization of premiums on purchased loans, net	192	160
Net increase in loans originated for sale	(4,022)	(3,942)
Proceeds from sales of loans originated for sale	4,335	4,215
Proceeds from sales and paydowns of foreclosed assets	256	585
ESOP expense	921	1,075
Allocation of stock award shares	993	1,388
Allocation of stock options	47	42
Net gain on sale of loans	(313)	(273)
Net gain on securities transactions	(11)	0
Net gain on sale of premises and equipment	(641)	0
Net gain on sale of foreclosed assets	(29)	(57)
Decrease in accrued interest receivable	1,232	295
(Increase) decrease in other assets	(82,099)	4,042
Decrease (increase) in other liabilities	79,111	(13,780)
Net cash provided by operating activities	33,357	31,368
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns of held to maturity debt securities	17,225	11,432
Purchases of held to maturity debt securities	(9,674)	(5,780)
Proceeds from maturities and paydowns of available for sale debt securities	64,466	40,258
Purchases of available for sale debt securities	(56,172)	(50,384)
Proceeds from redemption of Federal Home Loan Bank stock	28,549	31,536
Purchases of Federal Home Loan Bank stock	(32,449)	(31,357)
BOLI claim benefits received	1,985	0
Net (increase) decrease in loans	(39,897)	27,579
Proceeds from sales of premises and equipment	641	0
Purchases of premises and equipment	(1,664)	(593)
Net cash (used in) provided by investing activities	(26,990)	22,691
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Net increase in deposits	108,151	73,334
Increase in mortgage escrow deposits	1,666	1,795
Cash dividends paid to stockholders	(15,496)	(28,964)
Shares issued dividend reinvestment plan	451	840
Purchase of treasury stock	(4,985)	(180)
Purchase of employee restricted shares to fund statutory tax withholding	(956)	(1,914)
Stock options exercised	0	15
Proceeds from long-term borrowings	632,554	85,000
Payments on long-term borrowings	(300,159)	(213,360)
Net (decrease) increase in short-term borrowings	(243,764)	84,568
Net cash provided by financing activities	177,462	1,134
Net increase in cash and cash equivalents	183,829	55,193
Cash and cash equivalents at beginning of period	186,748	142,661
Cash and cash equivalents at end of period	370,577	197,854
Cash paid during the period for:
Interest on deposits and borrowings	15,819	17,377
Income taxes	115	100
Non-cash investing activities:
Initial recognition of operating lease right-of-use assets	0	44,946
Initial recognition of operating lease liabilities	0	46,050
Transfer of loans receivable to foreclosed assets	$ 2,067	$ 227