CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balances at Dec. 31, 2011	$ 446,109	$ 24,091	$ 177,828	$ 230,942	$ 13,248
Net income	8,476	0	0	8,476	0
Other comprehensive loss, net of tax	(410)	0	0	0	(410)
Common stock dividends	(2,432)	0	0	(2,432)	0
Stock compensation expense	399	0	399	0	0
Common stock issued pursuant to:
Employee stock purchase plan	121	8	113	0	0
Restricted stock	(346)	45	(391)	0	0
Balances at Mar. 31, 2012	451,917	24,144	177,949	236,986	12,838
Balances at Dec. 31, 2012	483,512	24,905	191,689	255,606	11,312
Net income	10,558			10,558
Other comprehensive loss, net of tax	(1,580)				(1,580)
Common stock dividends	(3,519)			(3,519)
Stock compensation expense	318		318
Common stock issued pursuant to:
Employee stock purchase plan	106	7	99
Restricted stock	(448)	43	(491)
Balances at Mar. 31, 2013	$ 488,947	$ 24,955	$ 191,615	$ 262,645	$ 9,732