Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic net Income or Loss per outstanding unit in the future and that were not included in the computation of diluted net income unit, because to do so would increase net income per unit amounts or decrease loss per unit amounts for the period presented.Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic net Income or Loss per outstanding limited partnership unit in the future and that were not included in the computation of diluted net income per limited partnership unit, because to do so would increase net income per unit amounts or decrease loss per unit amounts for the period presented.

No definition available.

Summary of Significant Accounting Policies (Narrative) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended	2 Months Ended	3 Months Ended												12 Months Ended
	May 04, 2017	Mar. 21, 2017	Sep. 06, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Dec. 15, 2015
Summary Of Significant Accounting Policies [Line Items]
Restricted cash				$ 343				$ 220								$ 343	$ 220
Common stock, shares authorized				75,000				75,000								75,000	75,000		40,000
Stock repurchase program, expiration date	May 2020
Stock repurchase program, shares authorized	5,000
Cash dividends paid				$ 0.01	$ 0.065	$ 0.065	$ 0.065	$ 0.065	$ 0.065	$ 0.065	$ 0.065	$ 0.06	$ 0.06	$ 0.06	$ 0.06
Dividends declared, per share																$ 0.205	$ 0.26	$ 0.24
Shared profits included in cost of sales related to collaborative arrangements																$ 61,587	$ 54,454	$ 41,036
Property held for sale				$ 6,113				$ 7,152								6,113	7,152
Depreciation and amortization																$ 2,006	$ 1,520	$ 1,522
Number of shares excluded from diluted weighted average shares outstanding																149
Non-cash goodwill impairment charge																$ (235,110)
Number of anti-dilutive shares exclude from calculation of diluted net income per common share																386
Impairment charges					$ 5,745											$ 250,521
Customer related intangible assets
Summary Of Significant Accounting Policies [Line Items]
Intangible asset and recognized an impairment charge					$ 15,411
Senior Notes
Summary Of Significant Accounting Policies [Line Items]
Conversion price				$ 33.215												$ 33.215
Interest rate swap \| Cash flow hedging \| December 21, 2021
Summary Of Significant Accounting Policies [Line Items]
Derivative, notional amount		$ 100,000
Derivative, expiration date		Dec. 21, 2021
Additional interest cost rate of derivative		2.005%
Subsequent Event
Summary Of Significant Accounting Policies [Line Items]
Dividends declared, per share			$ 0.01
Dividends declared, date of declaration			Sep. 06, 2018
Dividends declared, date of distribution			Oct. 09, 2018
Dividends declared, date of record			Sep. 24, 2018