CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
OPERATING ACTIVITIES
Net income	$ 14,102	$ 41,412	$ 14,088
Adjustments to reconcile net income to net cash provided by operating activities-
Depreciation	68,506	65,106	67,616
Amortization	3,593	3,574	3,734
Bad debt expense	970	102	974
Goodwill impairment charge	1,984		6,134
Other charges	18,786	(1,945)	7,210
Foreign currency (gain) loss	50	87	(422)
Deferred income taxes	2,711	12,059	(6,366)
Share-based compensation expense	2,650	3,307	5,031
Changes in assets and liabilities, net of effects of acquisitions-
Accounts receivable, net	11,498	2,179	6,191
Inventories	(2,761)	(666)	4,845
Prepaid expenses	(1,528)	(4,021)	8,056
Other assets	2,141	(4,886)	494
Accounts payable and accrued liabilities	(16,161)	(4,814)	30,153
Other liabilities	1,649	(909)	(68)
Income taxes payable	2	(9,422)	9,149
Net cash provided by operating activities	108,192	101,163	156,819
INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	(3,399)	(7,224)	(2,944)
Purchases of property and equipment	(59,965)	(68,752)	(24,195)
Proceeds from asset dispositions	3,209	3,905	7,163
Net cash used in investing activities	(60,155)	(72,071)	(19,976)
FINANCING ACTIVITIES
Proceeds from bank credit facilities	167,021	229,289	161,042
Payments on bank credit facilities	(181,092)	(234,787)	(265,839)
Proceeds from issuance of term equipment notes	24,052	25,508
Payments on term equipment notes and other debt	(16,123)	(33,820)	(31,120)
Payments to repurchase and retire common stock	(43,802)	(27,766)
Purchase of remaining interest in consolidated subsidiary			(5,500)
Proceeds from exercise of stock options, including excess tax benefit	4,251	9,594	1,311
Net cash used in financing activities	(45,693)	(31,982)	(140,106)
Effect of exchange rate changes on cash and cash equivalents	11	(141)	242
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	2,355	(3,031)	(3,021)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	3,710	6,741	9,762
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 6,065	$ 3,710	$ 6,741