Commitments and Contingencies (Detail)	Dec. 31, 2015 USD ($) Claims
Other Commitments [Line Items]
Number of pending claims | Claims	0
Indemnification of officers and directors [Member]
Other Commitments [Line Items]
Liabilities under guarantor agreements	$ 0
General indemnification [Member]
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Indemnification of business partners [Member]
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Service level credits [Member]
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Capital expenditures [Member]
Other Commitments [Line Items]
Purchase commitments	256,757,000
Miscellaneous purchase commitments [Member]
Other Commitments [Line Items]
Purchase commitments	$ 352,202,000