Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Proceeds from Sale of Loans Receivable	$ 9,986	$ 3,511
Operating Activities
Net Income	51,184	41,676
Provision for credit losses	2,834	20,306
Deferred tax expense	3,411	4,332
Depreciation and amortization	6,711	5,234
Net gains on securities and other assets	(3,821)	(2,288)
Net amortization of premiums and discounts on securities	2,685	3,486
Income from increase in cash surrender value of bank owned life insurance	(4,213)	(3,957)
Increase in interest receivable	(588)	(50)
Mortgage loans originated for sale	(116,699)	(94,611)
Proceeds from sale of mortgage loans	114,819	95,341
Increase (decrease) in interest payable	678	(324)
Increase (decrease) in income taxes payable	3,288	(3,055)
Other-net	2,963	(6,200)
Net cash provided by operating activities	63,252	59,890
Investing Activities
Proceeds from sale and maturity of held-to-maturity securities	36,620	35,470
Payments to acquire held-to-maturity securities	(101,372)	(42,837)
Proceeds from Sale of Available-for-sale Securities	143,660	55,744
Proceeds from maturities and redemptions of available-for-sale securities	100,620	122,828
Purchases of available-for-sale securities	(150,892)	(94,777)
Purchases of FHLB stock	(35,346)	(31,218)
Proceeds from the redemption of FHLB stock	42,791	40,104
Proceeds from sale of other assets	3,835	6,021
Increase in Restricted Cash	3,188	0
Net increase in loans	(132,079)	(200,269)
Payments for Purchase of Other Assets	(638)	(204)
Purchases of premises and equipment	(8,322)	(5,511)
Net cash used in investing activities	(87,949)	(110,935)
Proceeds from Life Insurance Policies	0	203
Financing Activities
Net decrease in federal funds purchased	0	(1,000)
Net decrease in other short-term borrowings	(62,118)	(179,498)
Net increase in deposits	123,455	263,392
Repayments of other long-term debt	(440)	(422)
Dividends paid	(22,717)	(18,678)
Proceeds from Sale of Treasury Stock	228	216
Purchase of treasury stock	(1,187)	(864)
Net cash provided by financing activities	37,048	63,146
Net increase in cash and cash equivalents	12,351	12,101
Cash and cash equivalents at January 1	115,677	69,452
Cash and cash equivalents at September 30	128,028	81,553
Repayments of Long-term Capital Lease Obligations	$ 173	$ 0