Fair Value Measurements - Additional Information (Detail) - 3 months ended Sep. 30, 2015	USD ($) Derivatives Contract	EUR (€) Derivatives Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Number of foreign currency forward contracts outstanding | Contract	5	5
Interest rate swap derivatives
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Number of interest rate derivatives | Derivatives	5	5
Notional amount	$ 350,000,000
Swaps hedged of variable rate basis	3-month LIBOR
Payments to forward swaps	$ 9,000,000
Amortization of forward swaps	10 years
Matured Foreign Currency Forward Sale Contracts
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount | €		€ 55,000,000
Foreign Exchange Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Proceeds from sale of foreign currency forward contracts	$ 12,000,000
Number of foreign currency forward contracts matured during the period | Contract	2	2
New foreign currency forward sale contracts
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount | €		€ 55,000,000
Number of foreign currency forward contracts outstanding | Contract	2	2
Series F senior notes 4.5% due February 2026
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Debt interest rate	4.50%	4.50%