Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 47,684	$ 82,084
Restricted cash	61,006	71,724
Fixed maturity securities, held to maturity, amortized cost-restricted	11,086
Accounts receivable, net	339,191	324,035
Equipment sales receivable	734	5,500
Income tax refund receivable	1,726	1,881
Inventories and supplies	22,441	17,441
Assets held for sale	21,329	13,571
Prepaid taxes, licenses, insurance and other	50,036	46,559
Deferred income taxes	84,961	96,885
Current portion of notes receivable	5,766	6,455
Total current assets	645,960	666,135
Property and equipment, at cost:
Revenue and service equipment	1,676,849	1,674,452
Land	125,788	133,711
Facilities and improvements	230,359	229,420
Furniture and office equipment	41,863	41,183
Total property and equipment	2,074,859	2,078,766
Less: accumulated depreciation and amortization	787,164	778,769
Net property and equipment	1,287,695	1,299,997
Other assets	66,398	68,791
Intangible assets, net	346,183	350,486
Goodwill	253,256	253,256
Total assets	2,599,492	2,638,665
Current liabilities:
Accounts payable	106,306	81,688
Accrued liabilities	103,063	101,327
Current portion of claims accruals	75,730	73,266
Current portion of long-term debt and obligations under capital leases	96,650	59,339
Fair value of guarantees	1,195	1,195
Total current liabilities	382,944	316,815
Long-term debt and obligations under capital leases	1,446,387	1,530,104
Claims accruals, less current portion	103,307	96,277
Fair value of interest rate swaps, less current portion	11,000	10,061
Deferred income taxes	397,088	415,088
Securitization of accounts receivable	163,000	180,000
Other liabilities		4,131
Total liabilities	2,503,726	2,552,476
Contingencies (note 15)
Stockholders' deficit:
Preferred stock, par value $0.01 per share; Authorized 1,000,000 shares; none issued
Additional paid-in capital	893,318	891,899
Accumulated deficit	(789,933)	(796,121)
Accumulated other comprehensive loss	(9,216)	(11,186)
Noncontrolling interest	202	202
Total stockholders' equity	95,766	86,189
Total liabilities and stockholders' equity	2,599,492	2,638,665
Class A Common Stock [Member]
Stockholders' deficit:
Common stock value	870	859
Total stockholders' equity	870	859
Class B Common Stock [Member]
Stockholders' deficit:
Common stock value	525	536
Total stockholders' equity	$ 525	$ 536