CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 31,497	$ 23,268
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,155	6,802
Provision for loan losses	1,635	4,263
Net amortization of premium on securities	5,692	5,823
Securities gains, net	(1,575)	(1,441)
Unrealized (gain)/loss on equity securities, net	(258)	28
Stock based compensation	2,375	1,858
Loans originated for sale	(61,348)	(112,433)
Proceeds on sales of loans held for sale	64,941	135,506
Net gains on sale of loans held for sale	(2,978)	(2,889)
Decrease in accrued interest receivable	682	3,239
(Increase) decrease in prepaid expenses	(1,708)	194
Increase in accrued interest payable	1,261	1,029
Capitalization of servicing rights	(266)	(1,183)
Valuation allowance on servicing rights	589	2
(Gain)/loss on sales/valuations of assets, net	1,512	(197)
Net excess tax benefit from stock based compensation	336	611
Other, net	(16,493)	(5,441)
NET CASH PROVIDED BY OPERATING ACTIVITIES	34,049	59,039
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of time deposits in other financial institutions	(248)	0
Proceeds from the sale of securities available for sale	434,154	392,246
Proceeds from the redemption of time deposits in other financial institutions	0	8,767
Proceeds from the maturity of and principal paydowns on securities available for sale	86,727	49,603
Proceeds from the maturity of and principal paydowns on securities held to maturity	2,156	3,570
Proceeds from the maturity of and principal paydowns on time deposits in other financial institutions	245	4,368
Proceeds from the sale, maturity of and principal paydowns on other investments	2,730	677
Purchase of securities available for sale	(299,105)	(244,289)
Purchase of other investments	(1,779)	(644)
Net (increase) decrease in loans	43,925	(32,314)
Purchase of bank owned life insurance policies	(5)	0
Capital expenditures	(1,123)	(2,356)
Net cash and cash equivalents received in acquisitions	0	5,543
Proceeds from the sale of equipment	117	615
Net cash received in divestitures	28,142	0
Proceeds on sale of OREO and other repossessed assets	2,537	668
NET CASH PROVIDED BY INVESTING ACTIVITIES	298,473	186,454
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase/(decrease) in demand deposits	(131,876)	5,834
Net increase in savings deposits	74,016	100,608
Net (increase) decrease in time deposit accounts	75,141	(69,143)
Proceeds on short-term revolving credit line	0	15,000
Net decrease in short-term borrowings	(43,000)	(168,451)
Proceeds from short term FHLB advances	430,888	220,000
Repayments of short term FHLB advances	(506,725)	(260,000)
Proceeds from other borrowings	50	0
Repayments of other borrowings	(6,868)	(14,995)
Purchase of treasury stock	0	(97)
Proceeds from issuance of common stock	253	14
Dividends paid	(5,530)	(3,920)
NET CASH USED BY FINANCING ACTIVITIES	(113,651)	(175,150)
Net increase in cash and cash equivalents	218,871	70,343
Cash and cash equivalents at beginning of year	273,630	196,003	$ 196,003
CASH AND CASH EQUIVALENTS AT END OF PERIOD	492,501	266,346	$ 273,630
Supplemental disclosures:
Cash paid for income/franchise taxes	84	2
Cash paid for interest	16,537	8,601
Loans transferred to OREO	1,694	939
Transfer of premises from premises, furniture and equipment, net, to premises, furniture and equipment held for sale	654	0
Deposits transferred to held for sale	76,968	0
Loans transferred to held for sale	32,111	0
Securities transferred from held to maturity to available for sale	148,030	0
Purchases of securities available for sale, accrued, not settled	2,019	0
Maturity of securities available for sale, accrued, not settled	1,000	0
Stock consideration granted for acquisitions	$ 0	$ 53,621