CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 21,414	$ 145,971
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion	39,494	38,127
Change in fair value of contingent consideration	0	(4,451)
Provision for doubtful accounts, net	1,167	3,225
Deferred tax provision	(37,024)	4,823
Stock compensation	4,024	5,417
Loss (gain) on sale of assets	471	(938)
Impairment of goodwill	113,944	0
Impairment of long-lived assets	10,089	6,773
Restructuring costs	7,369	0
Other	0	197
Changes in operating assets and liabilities:
Trade accounts receivable, net	(57,799)	(56,819)
Inventories, net	(73,591)	(130,844)
Prepaid expenses and other current assets	(20,029)	(22,411)
Income tax receivable	20,514	17,121
Other assets	1,943	(2,650)
Trade accounts payable	72,158	106,425
Contingent consideration	0	(797)
Accrued expenses	36,614	22,984
Income taxes payable	25,839	8,738
Long-term liabilities	133	4,740
Net cash provided by operating activities	166,730	145,631
Cash flows from investing activities:
Purchases of property and equipment	(36,710)	(50,535)
Purchases of tangible, intangible, and other assets, net	0	(4,700)
Proceeds from sale of assets	0	2,435
Net cash used in investing activities	(36,710)	(52,800)
Cash flows from financing activities:
Proceeds from short-term borrowings	405,988	386,200
Proceeds from issuance of stock under ESPP	412	0
Repayments of short-term borrowings	(439,109)	(367,896)
Cash paid for shares withheld for taxes	(6,313)	(1,790)
Excess tax benefit from stock compensation	1,331	59
Cash paid for repurchases of common stock	(12,571)	(69,201)
Contingent consideration paid	(19,784)	(161)
Loan origination costs on short-term borrowings	0	(59)
Repayment of mortgage principal	(384)	(365)
Net cash used in financing activities	(70,430)	(53,213)
Effect of exchange rates on cash	(9,118)	(1,752)
Net change in cash and cash equivalents	50,472	37,866
Cash and cash equivalents as of beginning of period	245,956	225,143
Cash and cash equivalents as of end of period	296,428	263,009
Cash paid (refunded) during the period for:
Income taxes, net of payments ($9,036 as of December 31, 2016 and $9,239 as of December 31, 2015)	(7,968)	8,739
Income taxes paid	9,036	9,239
Interest	4,179	2,151
Non-cash investing and financing activities:
Accrued for purchases of property and equipment	3,230	3,086
Accrued for asset retirement obligations	$ 2,350	$ 933