CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2011	$ 346,961	$ 1,806	$ 69,328	$ 318,130	$ (10,494)	$ (31,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,239	0	0	24,239	0	0
Other comprehensive income (loss)	3,417	0	0	0	3,417	0
Omnibus Equity Incentive Plan	366	2	364	0	0	0
Cash Dividends	(6,222)	0	0	(6,222)	0	0
Balance at Sep. 30, 2012	368,761	1,808	69,692	336,147	(7,077)	(31,809)
Balance at Jun. 30, 2012	358,287	1,807	69,571	328,056	(9,338)	(31,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,091	0	0	8,091	0	0
Other comprehensive income (loss)	2,261	0	0	0	2,261	0
Omnibus Equity Incentive Plan	122	1	121	0	0	0
Cash Dividends
Balance at Sep. 30, 2012	368,761	1,808	69,692	336,147	(7,077)	(31,809)
Balance at Dec. 31, 2012	372,122	1,808	69,989	338,342	(7,472)	(30,545)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,611	0	0	22,611	0	0
Other comprehensive income (loss)	(13,656)	0	0	0	(13,656)	0
Omnibus Equity Incentive Plan	550	2	548	0	0	0
Cash Dividends	(6,388)	0	0	(6,388)	0	0
Treasury stock purchase (5,354 shares)	(162)					(162)
Balance at Sep. 30, 2013	375,077	1,810	70,537	354,565	(21,128)	(30,707)
Balance at Jun. 30, 2013	368,403	1,809	70,354	346,093	(19,146)	(30,707)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,472	0	0	8,472	0	0
Other comprehensive income (loss)	(1,982)	0	0	0	(1,982)	0
Omnibus Equity Incentive Plan	184	1	183	0	0	0
Cash Dividends
Balance at Sep. 30, 2013	$ 375,077	$ 1,810	$ 70,537	$ 354,565	$ (21,128)	$ (30,707)