CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 5,710	$ 122,265	$ 161,780
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion	52,628	50,024	49,293
Change in fair value of contingent consideration	0	(4,411)	(3,574)
Provision for doubtful accounts, net	2,847	5,120	1,107
Deferred (benefit) tax provision	(24,495)	8,167	9,970
Stock-based compensation	6,175	6,622	13,524
Loss (gain) on sale of assets	538	(1,338)	0
Impairment of goodwill	113,944	0	0
Impairment of long-lived assets	13,222	9,773	0
Restructuring costs	29,087	24,856	0
Other	(71)	56	2,969
Changes in operating assets and liabilities:
Trade accounts receivable, net	(1,336)	(23,545)	(36,885)
Inventories, net	1,060	(61,492)	(26,748)
Prepaid expenses and other current assets	7,975	(3,681)	(10,376)
Income tax receivable	(1,331)	(8,286)	(15,170)
Other assets	2,259	(3,082)	(144)
Trade accounts payable	(7,825)	14,775	8,912
Contingent consideration	0	(819)	(364)
Accrued expenses	(990)	(16,221)	3,761
Income taxes payable	(3,743)	(397)	4,883
Long-term liabilities	3,023	7,195	6,716
Net cash provided by operating activities	198,677	125,581	169,654
Cash flows from investing activities:
Purchases of property and equipment, net	(44,499)	(65,356)	(91,147)
Purchases of tangible, intangible, and other assets, net	0	(4,700)	(9,489)
Proceeds from sale of assets	0	2,835	0
Net cash used in investing activities	(44,499)	(67,221)	(100,636)
Cash flows from financing activities:
Proceeds from short-term borrowings	405,988	449,200	199,784
Repayments of short-term borrowings	(468,938)	(387,120)	(201,705)
Proceeds from issuance of stock under the employee stock purchase plan	798	0	0
Cash paid for shares withheld for taxes	(7,865)	(3,691)	(5,674)
Excess tax benefit from stock compensation	100	471	4,197
Cash paid for repurchases of common stock	(12,572)	(94,200)	(107,239)
Contingent consideration paid	(20,058)	(445)	(115)
Loan origination costs on short-term borrowings	0	(62)	(818)
Proceeds from mortgage loan	0	0	33,931
Mortgage loan origination costs	0	0	(338)
Repayment of mortgage principal	(523)	(493)	(283)
Net cash used in financing activities	(103,070)	(36,340)	(78,260)
Effect of foreign currency exchange rates on cash	(5,300)	(1,207)	(10,703)
Net change in cash and cash equivalents	45,808	20,813	(19,945)
Cash and cash equivalents at beginning of period	245,956	225,143	245,088
Cash and cash equivalents at end of period	291,764	245,956	225,143
Cash paid (refunded) during the period for:
Income taxes, net of refunds ($17,132, $501, and $4,701 as of March 31, 2017, 2016 and 2015, respectively)	14,099	29,916	53,504
Proceeds from Income Tax Refunds	17,132	501	4,701
Interest	5,494	4,640	4,315
Non-cash investing and financing activities:
Accrued for purchases of property and equipment	1,101	2,640	3,419
Accrued for asset retirement obligations	2,359	1,394	786
Accrued for shares withheld for taxes	$ 587	$ 919	$ 0