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Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Intangible assets:    
Finite-lived intangible assets $ 303,297 $ 305,122
Indefinite-lived intangible assets 332,199 332,199
Gross intangible assets: 635,496 637,321
Less: Accumulated amortization (96,931) (83,541)
Net carrying value $ 538,565 $ 553,780 [1]
[1] December 31, 2016 balances were derived from the audited Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016, filed with the Securities and Exchange Commission (the SEC) on February 27, 2017.