Discontinued Operations (Details) (USD $)	3 Months Ended								12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2010 Segment, Discontinued Operations [Member]	Dec. 31, 2012 Segment, Discontinued Operations [Member]	Dec. 31, 2011 Segment, Discontinued Operations [Member]	Dec. 31, 2010 Segment, Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses												$ 2,200,000
OPERATING REVENUES	227,316,000	222,745,000	217,419,000	207,436,000	210,386,000	217,210,000	209,589,000	191,911,000	874,916,000	829,096,000	630,195,000		0	0	0
Income/(loss) from discontinued operations before taxes									(118,000)	(9,000)	2,552,000
Tax Benefit									0	0	(39,000)
(Loss)/income from discontinued operations, net of tax	(91,000)	0	(24,000)	(3,000)	1,000	(10,000)	0	0	(118,000)	(9,000)	2,591,000
Insurance recoveries, net of tax	$ 400,000		$ 100,000				$ 700,000								$ 2,800,000