Condensed Consolidating Financial Statements (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	$ (21,207)	$ 5,328
Investing activities:
Capital expenditures	(13,101)	(5,738)
Acquisition, net of cash received	(1,439)	(11,584)
Net cash used in investing activities	(14,540)	(17,322)
Financing activities:
Proceeds from issuance of debt	15,825
Payments of long-term debt	(1,576)	(3,015)
Net payments under other credit facilities		(3,081)
Debt issuance costs	(275)	(29)
Proceeds from exercise of stock options	41	16
Net cash provided by (used in) financing activities	14,015	(6,109)
Net decrease in cash and cash equivalents	(21,732)	(18,103)
Effect of foreign currency fluctuations on cash	(943)	50
Cash and cash equivalents at beginning of fiscal period	210,521	152,051
Cash and cash equivalents at end of fiscal period	187,846	133,998
Parent
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	(14,653)	3,114
Investing activities:
Capital expenditures		(1)
Acquisition, net of cash received	(439)
Net cash used in investing activities	(439)	(1)
Financing activities:
Proceeds from issuance of debt	15,825
Payments of long-term debt		(3,015)
Debt issuance costs	(275)
Proceeds from exercise of stock options	41	16
Net cash provided by (used in) financing activities	15,591	(2,999)
Net decrease in cash and cash equivalents	499	114
Cash and cash equivalents at beginning of fiscal period	7,933	6,417
Cash and cash equivalents at end of fiscal period	8,432	6,531
Guarantor Subsidiaries
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	(15,306)	(11,943)
Investing activities:
Capital expenditures	(3,660)	(3,700)
Acquisition, net of cash received	(1,000)	(11,584)
Net cash used in investing activities	(4,660)	(15,284)
Financing activities:
Debt issuance costs		(29)
Net cash provided by (used in) financing activities		(29)
Net decrease in cash and cash equivalents	(19,966)	(27,256)
Cash and cash equivalents at beginning of fiscal period	178,205	119,326
Cash and cash equivalents at end of fiscal period	158,239	92,070
Non-Guarantor Subsidiaries
Sources (uses) of cash and cash equivalents
Net cash provided by (used in) operating activities	8,752	14,157
Investing activities:
Capital expenditures	(9,441)	(2,037)
Net cash used in investing activities	(9,441)	(2,037)
Financing activities:
Payments of long-term debt	(1,576)
Net payments under other credit facilities		(3,081)
Net cash provided by (used in) financing activities	(1,576)	(3,081)
Net decrease in cash and cash equivalents	(2,265)	9,039
Effect of foreign currency fluctuations on cash	(943)	50
Cash and cash equivalents at beginning of fiscal period	24,383	26,308
Cash and cash equivalents at end of fiscal period	$ 21,175	$ 35,397