Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Operating activities:
Net income	$ 18,396	$ 41,979
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33,384	41,303
Write down of long-lived assets	15,786
Amortization of debt discount and debt issuance costs	2,903	3,964
Net (gain) loss on sales and disposals of assets	92	(1,406)
Stock-based compensation expense	1,378	911
Change in deferred income taxes	909	(1,186)
Change in operating assets	46,330	(64,485)
Change in operating liabilities	(48,116)	17,658
Other	841	(1,885)
Loss on early extinguishment of debt		38,248
Net cash provided by operating activities	71,903	75,101
Investing activities:
Capital expenditures	(31,793)	(19,559)
Acquisition, net of cash received	(11,584)
Proceeds from sales of assets		5,425
Net cash used in investing activities	(43,377)	(14,134)
Financing activities:
Proceeds from issuance of debt		227,525
Payments of long-term debt	(40,581)	(230,300)
Net payments under other credit facilities	(3,153)	(2,626)
Proceeds from exercise of stock options	225	21
Debt issuance costs	(36)	(7,750)
Debt extinguishment costs		(207)
Net cash used in financing activities	(43,545)	(13,337)
Net increase (decrease) in cash and cash equivalents	(15,019)	47,630
Effect of foreign currency fluctuations on cash	(983)	943
Cash and cash equivalents at beginning of fiscal period	152,051	79,199
Cash and cash equivalents at end of fiscal period	$ 136,049	$ 127,772