Significant Components of Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other Liabilities [Line Items]
Deferred revenues	$ 40,680	$ 41,773
Accrued expenses	29,046	23,617
Dividends payable	18,982	19,006
Accrued interest	11,246	2,819
Accrued income taxes	8,043
Other	73,901	67,590
Total	$ 181,898	$ 154,805