Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

Assets and liabilities measured at fair value on recurring basis

			Fair Value Measurements At December 31, 2011 Using
	Balance Sheet Location		Level 1		Level 2		Level 3		Total
			(In thousands)
Assets:
Investments held in Rabbi Trusts:
Cash and cash equivalents			$	3,783		—		—		3,783
U.S. equity mutual funds				8,850		—		—		8,850
Foreign equity mutual funds				2,526		—		—		2,526
Fixed income mutual funds				3,537		—		—		3,537
Investments held in Rabbi Trusts		DFL and other assets		18,696		—		—		18,696
Interest rate swaps		DFL and other assets		—		21,843		—		21,843
Total assets at fair value			$	18,696		21,843		—		40,539
Liabilities:
Contingent consideration		Accrued Expenses	$	—		—		1,000		1,000
Total liabilities at fair value			$	—		—		1,000		1,000
			Fair Value Measurements At December 31, 2010 Using
	Balance Sheet Location		Level 1		Level 2		Level 3		Total
			(In thousands)
Assets:
Investments held in Rabbi Trusts:
Cash and cash equivalents			$	2,348		—		—		2,348
U.S. equity mutual funds				8,409		—		—		8,409
Foreign equity mutual funds				5,188		—		—		5,188
Fixed income mutual funds				1,459		—		—		1,459
Investments held in Rabbi Trusts		DFL and other assets		17,404		—		—		17,404
Interest rate swap		DFL and other assets		—		15,429		—		15,429
Total assets at fair value			$	17,404		15,429		—		32,833

Assets and liabilities measured at fair value on nonrecurring basis

	Fair Value  Measurements At December 31, 2011 Using						Year ended December 31, 2011
	Level 1		Level 2		Level 3		Total Losses  (2)
Assets held for sale:
Revenue earning equipment: (1)
Trucks	$	—		—		6,147	$	6,645
Tractors		—		—		3,040		2,197
Trailers		—		—		296		2,428
Total assets at fair value	$	—		—		9,483	$	11,270
	Fair Value Measurements     At December 31, 2010 Using						Year ended December 31, 2010
	Level 1		Level 2		Level 3		Total Losses (2)
Assets held for sale:
Revenue earning equipment (1)
Trucks	$	—		—		11,796	$	13,014
Tractors		—		—		8,818		9,432
Trailers		—		—		1,437		3,812
Total assets at fair value	$	—		—		22,051	$	26,258

(1) Represents the portion of all revenue earning equipment held for sale that is recorded at fair value, less costs to sell.

(2) Total losses represent fair value adjustments for all vehicles held for sale throughout the period for which fair value less costs to sell was less than carrying value.