Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 9,502	$ 8,579
Adjustments to reconcile net income to net cash provided by operating activities:
Mortgage loans originated for sale	(56,001)	(2,448)
Proceeds from mortgage loans sold	50,010	5,968
Gain on sales of mortgage loans held for sale	(991)	(131)
Net gain on sales of investments	(1,664)	(590)
Provision for loan losses	1,500	2,000
Deferred income taxes	(823)	(783)
Net depreciation and amortization	3,058	3,158
(Decrease) Increase in accrued interest receivable	(194)	150
Gain on sale of other real estate owned		(4)
Increase in other assets	(2,203)	(5,311)
Increase in other liabilities	2,353	1,271
Net cash provided by operating activities	4,547	11,859
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities of short-term investments	6,317	17,315
Purchase of short-term investments	(8,561)	(21,100)
Proceeds from calls/maturities of securities available-for-sale	174,303	318,626
Proceeds from sales of securities available-for-sale	163,593	233,002
Purchase of securities available-for-sale	(482,373)	(490,103)
Proceeds from calls/maturities of securities held-to-maturity	37,453	54,211
Purchase of securities held-to-maturity	(29,825)	(161,722)
Net increase in loans	(45,143)	(48,302)
Proceeds from sales of other real estate owned		1,187
Capital expenditures	(658)	(2,209)
Net cash provided by (used in) investing activities	(184,894)	(99,095)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in time deposits	46,509	(14,087)
Net increase in demand, savings, money market and NOW deposits	149,613	228,897
Net proceeds from exercise of stock options	42	130
Cash dividends	(1,095)	(1,092)
Net increase in securities sold under agreements to repurchase	22,900	29,870
Net decrease in other borrowed funds	(18,000)	(35,590)
Net cash provided by financing activities	199,969	208,128
Net increase in cash and cash equivalents	19,622	120,892
Cash and cash equivalents at beginning of period	152,283	207,766
Cash and cash equivalents at end of period	171,905	328,658
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	9,317	10,022
Cash paid during the period for income taxes	1,550	1,353
Change in unrealized (losses) gains on securities available-for-sale, net of taxes	(22,553)	2,118
Pension liability adjustment, net of taxes	347	324
Due to broker	$ 10,711	$ 37,195