Consolidated Statements of Cash Flows - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Dec. 31, 2015	May. 31, 2015	May. 31, 2014	May. 31, 2013
Cash flows from operating activities:
Net income	$ 8,878	$ 40,497	$ 30,149	$ 32,714
Adjustments to reconcile net income to net cash provided by operating activities:
Earnings from unconsolidated affiliates			(822)	(992)
Depreciation and amortization	19,426	22,787	21,468	19,664
Loss on asset impairment and disposals	51	617	78	193
Amortization of deferred loan costs	256	223	223	222
Loss on investment in Venezuela		1,177
Foreign currency loss	813	1,509	4,185	943
Deferred income taxes	2,411	(729)	(1,040)	5,089
Loss (gain) on contingent consideration revaluation	522		(2,138)
Non-cash compensation cost	3,469	4,838	4,239	3,931
(Increase) decrease, net of the effects of acquisitions:
Receivables	17,050	(43,192)	(6,812)	(10,964)
Inventory	372	(925)	822	(1,405)
Prepaid expenses and other current assets	(111)	(2,525)	(17)	443
Increase (decrease), net of the effects of acquisitions:
Accounts payable	(13,365)	10,789	(295)	3,210
Other accrued liabilities	(14,426)	9,377	(1,208)	7,779
Income taxes	(8,085)	(972)	4,029	(2,184)
Net cash provided by operating activities	17,261	43,471	52,861	58,643
Cash flows from investing activities:
Capital expenditures	(25,802)	(28,769)	(33,016)	(26,068)
Proceeds from sale of assets	5,227	133	357	758
Business acquisitions, net of cash acquired	(262,100)	(3,075)	(10,175)	(18,589)
Change in restricted cash	(5,000)
Change related to Venezuelan operations		(620)
Distributions from joint venture			2,223	1,000
(Increase) decrease in other assets, net	(105)	550	2
Net cash used in investing activities	(287,780)	(31,781)	(40,609)	(42,899)
Cash flows from financing activities:
Net borrowings (payments) under revolving credit agreement	103,000	8,000		(13,600)
Net borrowings under term loan	190,000
Deferred consideration payments	(2,307)	(1,000)	(1,000)
Contingent consideration payments	(230)	(1,000)
Purchase of non-controlling interest	(5,934)
Debt issuance costs	(1,950)
Payments related to withholding tax for share-based payment arrangements	(1,375)	(1,775)	(1,710)	(1,534)
Corporate tax effect from share-based payment arrangements	374	3,034	1,131	2,996
Issuance of common stock from share-based payment arrangements	2,142	3,804	5,270	8,275
Purchase of treasury stock		(21,138)	(13,334)
Net cash provided by (used in) financing activities	283,720	(10,075)	(9,643)	(3,863)
Effect of exchange rate changes on cash	(1,587)	(3,060)	(2,154)	(157)
Net increase (decrease) in cash and cash equivalents	11,614	(1,445)	455	11,724
Cash and cash equivalents at beginning of period	33,211	34,656	34,201	22,477
Cash and cash equivalents at end of period	44,825	33,211	34,656	34,201
Cash paid during the year for:
Interest	3,907	2,028	2,728	2,615
Income taxes	10,252	21,491	12,111	12,926
Venezuela
Adjustments to reconcile net income to net cash provided by operating activities:
Foreign currency loss			3,962
Foreign Non-Venezuela [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Foreign currency loss	$ 813	$ 1,509	$ 223	$ 943