CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities
Net income	$ 22,705	$ 18,027
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,669	1,568
Amortization of premiums and discounts on securities, net	625	742
Amortization of operating lease right-of-use assets	1,025
Other amortization and accretion, net	(810)	(406)
Stock based compensation	2,129	1,454
Origination of loans designated for sale	(54,034)	(78,156)
Sale of loans designated for sale	54,813	83,459
Provision for loan losses	1,397	1,085
Deferred income taxes	1,216	4,707
Losses on sale of securities	87	0
Gains on sale of loans	(1,819)	(1,884)
Gains on sale and write-downs of other real estate owned	(187)	1
Losses on disposition of fixed assets	(208)	(4)
Changes in operating assets and liabilities, net of effects from acquired companies:
Net decrease in other assets	2,069	2,234
Net decrease in other liabilities	(10,594)	(273)
Net cash provided by operating activities	20,083	32,554
Cash Flows from Investing Activities
Maturities and repayments of debt securities available for sale	18,261	27,296
Maturities and repayments of debt securities held to maturity	8,830	16,085
Proceeds from sale of debt securities available for sale	35,048	0
Purchases of debt securities available for sale	0	(72,311)
Maturities of time deposits with other banks	69	0
Net new loans and principal repayments	(3,141)	(84,063)
Proceeds from sale of other real estate owned	1,572	3,300
Proceeds from sale of FHLB and Federal Reserve Bank Stock	22,057	10,540
Purchase of FHLB and Federal Reserve Bank Stock	(9,749)	(13,027)
Proceeds from sale of Visa Class B stock	0	21,333
Redemption of bank owned life insurance	12,378	4,232
Additions to bank premises and equipment	(849)	(1,288)
Net cash provided by (used in) investing activities	84,476	(87,903)
Cash Flows from Financing Activities
Net increase in deposits	428,338	126,823
Net decrease in federal funds purchased and repurchase agreements	(66,318)	(42,845)
Net decrease in FHLB borrowings	(377,000)	(3,000)
Stock based employee benefit plans	(1,519)	726
Dividends paid	0	0
Net cash (used in) provided by financing activities	(16,499)	81,704
Net increase in cash and cash equivalents	88,060	26,355
Cash and cash equivalents at beginning of period	115,951	109,504
Cash and cash equivalents at end of period	204,011	135,859
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	11,422	5,533
Cash paid during the period for taxes	0	1,200
Initial recognition of operating lease right-of-use assets	29,077	0
Initial recognition of operating lease liabilities	33,403	0
Supplemental disclosure of non cash investing activities:
Transfer of debt securities from held to maturity to available for sale	52,796	0
Transfers from loans to other real estate owned	430	3,919
Transfers from bank premises to other real estate owned	$ 0	$ 2,030