Derivative Financial Instruments and Fair Value Measurement - Summary of Interest Rate Swap Agreements (Detail) - Jun. 30, 2015 - Interest rate swap contracts [Member] - USD ($) $ in Thousands	Total
Derivative [Line Items]
Fixed Interest Rates, Low	2.75%
Fixed Interest Rates, High	3.19%
Expiration Date	Mar. 31, 2017
Notional Amount	$ 650,000