CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income		$ 21,778	$ 19,563
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment		1,536	1,548
Provision for loan losses		18,900	2,550
Increase in valuation allowance			12,325
Amortization of intangibles		338	386
Net accretion of loans		(806)	(846)
Accretion on bank premises		(33)	(41)
Accretion on deposits		(31)	(12)
Accretion on borrowings		(82)	(107)
Stock-based compensation expense		(98)	852
Gains on sales of investment securities, net	[1]		(1,596)	[2]
Loss on equity securities, net		168
Gains on sales of loans held-for-sale, net		(29)	(70)
Gains on sales of fixed assets, net			(8)
Loans originated for resale		(1,498)	(3,891)
Proceeds from sale of loans held-for sale		1,897	8,979
Net loss on sale of other real estate owned			82
Increase in cash surrender value of bank owned life insurance		(964)	(1,417)
Amortization of premiums and accretion of discounts on investments securities, net		1,832	1,078
Amortization of subordinated debt issuance costs		168	82
Increase in accrued interest receivable		(1,284)	(229)
(Increase) decrease in other assets		(126)	4,787
Increase in other liabilities		12,633	4,026
Net cash provided by operating activities		54,299	48,041
Investment securities available-for-sale:
Purchases		(60,595)	(117,857)
Sales			29,543
Maturities, calls and principal repayments		75,506	39,313
Net (purchases) redemptions of restricted investment in bank stocks		1,056	(7,842)
Payments on loans held-for-sale		159	2,379
Net increase in loans		(181,868)	(278,208)
Proceeds from sales of fixed assets			8
Purchases of premises and equipment		(233)	(1,062)
Proceeds from sale of other real estate owned			544
Net cash used in investing activities		(165,975)	(333,182)
Cash flows from financing activities
Net increase in deposits		110,313	86,114
Increase in subordinated debentures		73,525
Advances of Federal Home Loan Bank ("FHLB") borrowings		863,000	425,000
Repayments of FHLB borrowings		(904,000)	(260,000)
Repayment of repurchase agreement			(15,000)
Cash dividends paid on common stock		(4,827)	(4,802)
Common stock issuance costs			(180)
Proceeds from exercise of stock options		252	118
Net cash provided by financing activities		138,263	231,250
Net change in cash and cash equivalents		26,587	(53,891)
Cash and cash equivalents at beginning of period		149,582	200,399
Cash and cash equivalents at end of period		176,169	146,508
Cash payments for:
Interest paid on deposits and borrowings		25,055	14,643
Income taxes		1,497	3,065
Supplemental disclosures of noncash investing activities
Transfer of loans to other real estate owned		538	580
Transfer of loans held-for-investment to loans held-for-sale		21,236
Transfer of loans held-for-sale to held-for-investment		$ 45,552	$ 7,159

[1] Not within scope of ASC 606.

[2] The Company elected the modified respective approach of adoption; therefore, prior period balances are presented under legacy GAAP and may not be comparable to current year presentation.