Details of One Point Five Zero Percent Convertible Notes Reflected on Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Net debt carrying amount	[1]	$ 961,957	$ 1,254,160
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018
Debt Instrument [Line Items]
Equity component carrying amount		48,767	48,767
Unamortized discount		10,321	17,531
Net debt carrying amount	[2]	$ 284,729	$ 277,518

[1] Carrying amounts include aggregate unamortized debt discount and debt issuance costs.

[2] During FY 2016, the Company repurchased a total of $104.9 million par value (of which $51.7 million and $53.2 million were purchased in June 2016 and July 2016, respectively) of the 1.50% Convertible Notes. See below for further details. On August 2, 2017, the Company entered into a long-term refinancing arrangement with Deutsche Bank AG for an aggregate principal amount of $300 million (refer to Note 20 for further details). In accordance with ASC 470, as the terms of the refinancing are readably determinable and the terms of the credit agreement is five years (scheduled to mature on August 2, 2022), the Company has classified the 1.50% Convertible Notes of $284.7 million as long-term debt on its June 30, 2017 condensed consolidated balance sheet.