Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 14,261	$ 12,504
Adjustments to reconcile net income to net cash provided by operating activities:
Mortgage loans originated for sale	(10,812)
Proceeds from mortgage loans sold	14,497
Gain on sale of mortgage loans held for sale	(296)
Net gain on sales of investments	(1,119)	(1,245)
Gain on sale of loans		(364)
Provision for loan losses	3,250	3,600
Deferred income taxes	(1,377)	(1,024)
Net depreciation and amortization	4,838	3,828
Decrease in accrued interest receivable	156	608
Gain on sale of other real estate owned	(4)
Increase in other assets	(3,303)	(5,587)
Increase in other liabilities	3,788	816
Net cash provided by operating activities	23,879	13,136
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities of short-term investments	23,351	119,044
Purchase of short-term investments	(36,364)	(24,495)
Proceeds from maturities of securities available-for-sale	429,440	556,599
Proceeds from sales of securities available-for-sale	271,500	43,124
Purchase of securities available-for-sale	(654,900)	(955,685)
Proceeds from maturities of securities held-to-maturity	69,831	95,708
Purchase of securities held-to-maturity	(175,343)
Proceeds from sale of loans		11,295
Net increase in loans	(85,354)	(58,990)
Proceeds from sales of other real estate owned	1,187
Capital expenditures	(3,309)	(2,328)
Net cash used in investing activities	(159,961)	(215,728)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net (decrease) increase in time deposits	(1,871)	82,456
Net increase in demand, savings, money market and NOW deposits	220,570	120,930
Net proceeds from exercise of stock options	137	6
Cash dividends	(1,639)	(1,635)
Net increase in securities sold under agreements to repurchase	32,740	24,480
Net decrease in other borrowed funds	(59,999)	(28,975)
Net cash provided by financing activities	189,938	197,262
Net increase (decrease) in cash and cash equivalents	53,856	(5,330)
Cash and cash equivalents at beginning of period	207,766	188,552
Cash and cash equivalents at end of period	261,622	183,222
Cash paid during the period for:
Interest	14,828	17,578
Income taxes	1,828	2,311
Change in unrealized gains on securities available-for-sale, net of taxes	4,217	6,876
Pension liability adjustment, net of taxes	487	285
Due to broker	10,750	5,000
Transfer of loans to other real estate owned	$ 400