Consolidated Condensed Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net Income	$ 18,686	$ 19,044
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	910	1,632
Amortization (accretion) of investment securities, net	1,674	1,565
Provision for depreciation	2,049	1,691
Amortization (accretion) of investment securities, net	16	(63)
Amortization of prepayment penalty of long-term debt	1,531	1,497
Loan originations to be sold in secondary market	(40,285)	(40,270)
Proceeds from sale of loans in secondary market	36,835	38,254
Share-based compensation expense	468	259
OREO valuation adjustments	118	304
Gain on sale of OREO, net	(134)	(673)
Gain on sale of commercial loans held for sale	0	(756)
Bank owned life insurance income	(1,197)	(1,878)
Changes in assets and liabilities:
Increase in other assets	(7,018)	(8,391)
Increase in other liabilities	(8)	(3,320)
Net cash provided by operating activities	12,884	8,188
Proceeds from maturity of:
Available-for-sale securities	341,879	78,523
Held-to-maturity securities	4,984	7,179
Purchases of:
Available-for-sale securities	(259,756)	(29,931)
Payments to Acquire Held-to-maturity Securities	(9,885)	0
Net loan originations, portfolio loans	10,476	(5,215)
Proceeds from the sale of commercial loans held for sale		900
Investments in qualified affordable housing projects	(2,847)	(2,591)
Proceeds from the sale of OREO	1,387	3,861
Life insurance death benefits	765	5,221
Purchases of premises and equipment, net	(1,581)	(3,401)
Net cash provided by investing activities	85,422	54,546
Financing activities:
Net increase in deposits	259,148	387,847
Net decrease in short-term borrowings	(174,599)	(37,019)
Proceeds from issuance of long-term debt	0	25,000
Repurchase of treasury shares	0	(1,783)
Repayment of long-term debt	0	(79,544)
Cash dividends paid	(14,411)	(14,449)
Net cash provided by financing activities	70,138	280,052
Increase in cash and cash equivalents	168,444	342,786
Cash and cash equivalents at beginning of year	149,459	237,699
Cash and cash equivalents at end of period	317,903	580,485
Supplemental disclosures of cash flow information:
Cash paid for interest	9,454	9,446
Cash paid for income taxes	0	0
Non cash activities:
Loans transferred to OREO	439	7,270
Transfers from loans to commercial loans held for sale	0	144
Securities acquired through payable	17,156	0
Mortgage Loans on Real Estate [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of loans in secondary market	761	$ 707
Commercial Portfolio Segment [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of commercial loans held for sale	0
Purchases of:
Proceeds from the sale of commercial loans held for sale	$ 0