Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 42,329	$ 41,598
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangibles	6,585	6,886
Provision for loan losses	3,200	1,700
Deferred tax expense	112	2,197
Increase in cash surrender value of Bank-owned life insurance	(2,701)	(2,665)
Net amortization of premiums and discounts on securities	5,037	5,397
Accretion of net deferred loan fees	(1,627)	(1,905)
Amortization of premiums on purchased loans, net	514	564
Net increase in loans originated for sale	(7,750)	(4,713)
Proceeds from sales of loans originated for sale	8,457	5,214
Proceeds from sales of foreclosed assets	2,501	2,277
ESOP expense	1,530	1,390
Allocation of stock award shares	1,495	2,452
Allocation of stock options	88	128
Net gain on sale of loans	(707)	(501)
Net gain on securities transactions	(97)	(645)
Net (gain) loss on sale of premises and equipment	(4)	6
Net gain on sale of foreclosed assets	(235)	(140)
Decrease (increase) in accrued interest receivable	289	(400)
Increase in other assets	(15,156)	(11,052)
Increase in other liabilities	13,162	4,270
Net cash provided by operating activities	57,022	52,058
Cash flows from investing activities:
Proceeds from maturities, calls and paydowns of investment securities held to maturity	17,336	16,581
Purchases of investment securities held to maturity	(23,930)	(20,443)
Proceeds from sales of securities	2,193	14,005
Proceeds from maturities, calls and paydowns of securities available for sale	92,819	96,155
Purchases of securities available for sale	(130,788)	(73,120)
Net decrease (increase) in Federal Home Loan Bank stock	1,871	(8,103)
Net cash and cash equivalents paid in acquisition	0	(25,613)
Purchases of loans	(28,590)	(49,762)
Net increase in loans	(216,119)	(176,873)
Proceeds from sales of premises and equipment	4	0
Purchases of premises and equipment	(2,411)	(3,222)
Net cash used in investing activities	(287,615)	(230,395)
Cash flows from financing activities:
Net increase in deposits	305,899	21,698
Increase in mortgage escrow deposits	4,893	4,321
Purchases of treasury stock	(2,702)	(1,933)
Cash dividends paid to stockholders	(23,222)	(21,297)
Shares issued through the dividend reinvestment plan	751	729
Stock options exercised	2,630	1,065
Proceeds from long-term borrowings	251,652	329,937
Payments on long-term borrowings	(295,336)	(157,096)
Net increase in short-term borrowings	1,329	1,883
Net cash provided by financing activities	245,894	179,307
Net increase in cash and cash equivalents	15,301	970
Cash and cash equivalents at beginning of period	102,226	103,762
Cash and cash equivalents at end of period	117,527	104,732
Cash paid during the period for:
Interest on deposits and borrowings	21,821	20,323
Income taxes	15,676	18,356
Non-cash investing activities:
Transfer of loans receivable to foreclosed assets	2,529	5,127
Goodwill and other intangible assets, net	0	29,953
Other assets	0	112
Total non-cash assets acquired	0	30,065
Other Liabilities	0	366
Total liabilities assumed	$ 0	$ 366