Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Condensed Consolidated Statements of Cash Flows (unaudited) [Abstract]
Net Income	$ 32,556	$ 29,903
Adjustments to Reconcile Net Income to Net Cash From Operating Activities
Proceeds from the sale of equity securities at fair value	560	0
Proceeds from sales of loans held for sale	422,557	351,486
Disbursements for loans held for sale	(451,572)	(343,462)
Provision for loan losses	1,045	912
Deferred income tax expense	1,216	6,972
Deferred loan fees and costs	(3,122)	(3,681)
Net depreciation, amortization of intangible assets and premiums and accretion of discounts on securities, loans and interest bearing deposits - time	4,427	4,560
Net gains on mortgage loans	(13,590)	(8,571)
Net (gains) losses on securities	(304)	71
Share based compensation	1,348	1,293
Increase in accrued income and other assets	(2,149)	(16,925)
Increase (decrease) in accrued expenses and other liabilities	13,088	(1,930)
Total Adjustments	(26,496)	(9,275)
Net Cash From Operating Activities	6,060	20,628
Cash Flow Used in Investing Activities
Proceeds from the sale of securities available for sale	44,305	31,445
Proceeds from maturities, prepayments and calls of securities available for sale	110,517	125,275
Purchases of securities available for sale	(123,238)	(71,067)
Proceeds from the sale of interest bearing deposits - time	0	2,474
Proceeds from the maturity of interest bearing deposits - time	100	3,728
Purchase of Federal Reserve Bank stock	0	(2,034)
Net increase in portfolio loans (loans originated, net of principal payments)	(213,116)	(272,084)
Proceeds from the sale of portfolio loans	50,516	27,577
Acquisition of TCSB Bancorp Inc., less cash received	0	23,516
Proceeds from bank-owned life insurance	470	474
Proceeds from the sale of other real estate and repossessed assets	1,438	1,777
Capital expenditures	(2,587)	(2,812)
Net Cash Used in Investing Activities	(131,595)	(131,731)
Cash Flow From Financing Activities
Net increase in total deposits	138,884	110,400
Net increase in other borrowings	18,355	18,903
Proceeds from Federal Home Loan Bank Advances	57,000	1,202,000
Payments of Federal Home Loan Bank Advances	(37,143)	(1,210,197)
Dividends paid	(12,507)	(10,446)
Proceeds from issuance of common stock	282	202
Repurchase of common stock	(26,284)	0
Share based compensation withholding obligation	(879)	(1,327)
Net Cash From Financing Activities	137,708	109,535
Net Increase (Decrease) in Cash and Cash Equivalents	12,173	(1,568)
Cash and Cash Equivalents at Beginning of Period	70,244	54,738
Cash and Cash Equivalents at End of Period	82,417	53,170
Cash paid during the period for
Interest	20,185	11,168
Income taxes	5,934	120
Operating leases	1,692	0
Transfers to other real estate and repossessed assets	1,901	960
Purchase of securities available for sale not yet settled	3,075	1,000
Securitization of portfolio loans	29,790	0
Right of use assets obtained in exchange for lease obligations	7,767	0
Transfer of loans to held for sale	$ 36,622	$ 27,577

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The cash inflow from the additional capital contribution to the entity.

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Amount of cash inflow for proceeds from settlement of corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance policy.

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Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The net cash inflow or outflow in Interest-bearing Deposits by banks in other financial institutions for relatively short periods of time including, for example, certificates of deposits.

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Amount of cash inflow (outflow) for debt classified as other.

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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The cash inflow from the sale assets received in full or partial satisfaction of a receivable including real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts. Foreclosed assets also include loans that are treated as if the underlying collateral had been foreclosed because the institution has taken possession of the collateral, even though legal foreclosure or repossession proceedings have not taken place.

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The cash inflow from Sales of Loans Held For Investment.

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Amount of expense related to estimated loss from loan and lease transactions.

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Amount of cash outflow for repayment of Federal Home Loan Bank (FHLBank) borrowing, classified as financing activity.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of noncash expense for share-based payment arrangement.

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Value transferred out of real estate owned (REO) in noncash transactions.

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Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions.

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