Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
OPERATING ACTIVITIES
Net income	$ 49,658	$ 43,414
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	6,473	608
Provision for unfunded loan commitments	687	(262)
Depreciation, amortization and accretion	(6)	3,510
Net amortization of discounts and premiums on securities	2,682	2,800
Stock-based compensation expense	1,158	594
Securities losses (gains), net	34	(41)
Tax benefit from stock-based compensation	(53)	0
Mortgage loans originated for sale	(81,966)	(28,652)
Proceeds from the sale of mortgage loans	71,872	27,894
Gain on the sale of mortgage loans, net	(730)	(232)
Net increase in interest receivable	(2,280)	(604)
Net decrease in interest payable	(637)	(423)
Net decrease in other assets	13,216	10,749
Net increase (decrease) in other liabilities	1,531	(897)
Net Cash Provided by Operating Activities	61,639	58,458
INVESTING ACTIVITIES
Purchases of securities available-for-sale	(54,465)	(149,268)
Proceeds from maturities, prepayments and calls of securities available-for-sale	36,680	46,662
Proceeds from sales of securities available-for-sale	11,119	1,418
Net purchases of Federal Home Loan Bank stock	(3,535)	(5,366)
Net increase in loans	(276,282)	(244,836)
Proceeds from sale of loans not originated for resale	2,804	5,408
Purchases of premises and equipment	(3,737)	(3,220)
Proceeds from the sale of premises and equipment	264	98
Net cash paid in excess of cash acquired from bank merger	(16,347)	0
Net Cash Used in Investing Activities	(303,499)	(349,104)
FINANCING ACTIVITIES
Net increase in core deposits	259,725	176,182
Net (decrease) increase in certificates of deposit	(12,399)	52,491
Net increase (decrease) in securities sold under repurchase agreements	12,366	(10,763)
Net (decrease) increase in short-term borrowings	(78,660)	125,000
Proceeds from long-term borrowings	100,000	0
Repayments of long-term borrowings	(1,829)	(1,768)
Repayment of junior subordinated debt	(13,500)	0
Treasury shares issued-net	(111)	(163)
Common stock issuance costs	(132)	0
Cash dividends paid to common shareholders	(17,886)	(14,858)
Tax benefit from stock-based compensation	53	0
Net Cash Provided by Financing Activities	247,627	326,121
Net increase in cash and cash equivalents	5,767	35,475
Cash and cash equivalents at beginning of period	109,580	108,356
Cash and Cash Equivalents at End of Period	115,347	143,831
Supplemental Disclosures
Loans transferred to held for sale	0	1,300
Interest paid	11,853	9,590
Income taxes paid, net of refunds	15,675	12,900
Net assets acquired from bank merger, excluding cash and cash equivalents	43,433	0
Transfers of loans to other real estate owned	$ 628	$ 430