Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net Income	$ 18,937	$ 15,770
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,162	780
Depreciation of premises and equipment, net	2,190	1,903
Amortization of fees and discounts, net	4,742	3,895
Amortization of intangible assets	857	549
Decrease in accrued interest receivable	315	48
Increase in other assets	(1,838)	(3,534)
Origination of loans held for sale	(85,833)	(72,474)
Proceeds from sales of loans held for sale	105,436	77,834
Gain on mortgage banking activities, net	(1,185)	(1,654)
Gain on sale of securities, net	(320)	(305)
Stock-based compensation expense	821	758
Increase in accrued interest payable	1,780	539
Decrease in other liabilities	(1,537)	(7,930)
Loss on sale of other real estate owned and valuation adjustments, net	39	76
Deferred income tax expense	3,190	3,293
Increase in value of bank owned life insurance	(275)	(231)
Increase in capitalized interest, net	(1,316)	(1,193)
Net cash provided by operating activities	48,165	18,124
Investing activities:
Purchases of investment securities held to maturity	0	(3,329)
Repayments of investment securities held to maturity	250	1,335
Maturities and calls of investment securities held to maturity	0	400
Sale of investment securities available for sale	263,015	38,932
Purchases of investment securities available for sale	(375,687)	(91,963)
Repayments of investment securities available for sale	119,313	15,463
Net increase in loans	(106,933)	(30,010)
Redemptions of stock of Federal Home Loan Bank of Pittsburgh	(54,990)	(20,037)
Redemptions of stock of Federal Home Loan Bank of Pittsburgh	73,236	19,845
Sales of other real estate owned	1,707	1,442
Investment in premises and equipment	(2,480)	(1,234)
Net cash used for investing activities	(82,569)	(69,156)
Financing activities:
Net increase in demand and saving deposits	508,429	35,907
Decrease in time deposits	(22,998)	(26,072)
Increase in brokered deposits	137,797	43,353
Decrease in loan payable	(420)	(407)
Receipts from FHLB advances	42,415,835	28,349,212
Repayments of FHLB advances	(42,971,976)	(28,310,900)
Receipts from federal funds purchased and securities sold under agreement to repurchase	6,688,000	8,710,770
Repayments of federal funds purchased and securities sold under agreement to repurchase	(6,683,000)	(8,711,445)
Dividends paid	(2,199)	(1,783)
Issuance of common stock and exercise of common stock options	1,094	241
Purchase of treasury stock	(2,818)	(8,995)
Net cash provided by financing activities	67,744	79,881
Increase in cash and cash equivalents	33,340	28,849
Cash and cash equivalents at beginning of period	821,923	561,179
Cash and cash equivalents at end of period	855,263	590,028
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest during the period	5,943	4,151
Cash (received) paid for income taxes, net	(1,199)	9,554
Loans transferred to other real estate owned	1,737	417
Loans transferred to portfolio from held-for-sale at fair value	6,470	1,510
Net change in accumulated other comprehensive income	830	10,758
Non-cash goodwill adjustments, net	$ (1,579)	$ (358)