Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 21,144	$ 17,986
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,459	6,483
Changes in net deferred loan costs, net of amortization	(509)	(455)
Provision for loan losses	1,998	2,259
Net change in accrued interest receivable, prepaid expenses and other assets, accrued expenses and other liabilities	3,482	(3,071)
Stock-based compensation expense	1,040	872
Net excess tax benefit from exercise of stock options and vesting of restricted stock	0	(97)
Amortization of intangible assets	647	698
Gain on sale of investment securities, net	(117)	(761)
Origination of loans held for sale	(54,449)	(57,975)
Gain on sale of loans, net	(5,333)	(1,971)
Proceeds from sale of loans	71,436	60,498
Earnings on bank owned life insurance	(747)	(695)
Valuation adjustment on other real estate owned	0	383
Gain on sale of assets held for sale	(53)	0
Gain on sale of other real estate owned, net	0	(42)
Loss on sale or write-off of furniture, equipment and leasehold improvements	12	244
Net cash provided by operating activities	44,010	24,356
Cash flows from investing activities:
Loans originated, net of principal payments	(114,390)	(126,335)
Maturities of other interest earning deposits	0	1,248
Maturities, calls and payments of investment securities available for sale	52,461	60,803
Purchase of investment securities available for sale	(57,972)	(128,046)
Purchase of premises and equipment	(1,382)	(1,088)
Proceeds from sales of other real estate owned	0	770
Proceeds from sales of investment securities available for sale	15,032	75,837
Proceeds from sale of assets held for sale	265	0
Proceeds from redemption of Federal Home Loan Bank stock	16,456	10,460
Purchases of Federal Home Loan Bank stock	(17,975)	(12,012)
Investment in low-income housing tax credit partnership	(7)	(2,254)
Net cash used in investing activities	(107,512)	(120,617)
Cash flows from financing activities:
Net increase in deposits	61,602	50,619
Federal Home Loan Bank advances	442,700	294,500
Repayments of Federal Home Loan Bank advances	(411,400)	(261,500)
Common stock cash dividends paid	(7,497)	(6,894)
Net decrease in securities sold under agreement to repurchase	(849)	(6,499)
Proceeds from exercise of stock options	109	369
Net excess tax benefit from exercise of stock options and vesting of restricted stock	0	97
Repurchase of common stock	(674)	(2,126)
Net cash provided by financing activities	83,991	68,566
Net increase (decrease) in cash and cash equivalents	20,489	(27,695)
Cash and cash equivalents at beginning of period	103,745	126,640
Cash and cash equivalents at end of period	124,234	98,945
Supplemental disclosures of cash flow information:
Cash paid for interest	3,688	3,008
Cash paid for income taxes	1,007	6,000
Supplemental non-cash disclosures of cash flow information:
Transfers of loans receivable to other real estate owned	32	652
Transfers of loans receivable to loans held for sale	5,779	0
Transfers of premises and equipment, net to prepaid expenses and other assets for properties held for sale	2,687	0
Investment in low income housing tax credit partnership and related funding commitment	0	10,224
Purchases of investment securities available for sale not settled	$ 2,268	$ 1,164