Significant Components of Other Current Liabilities (Detail) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Other Liabilities [Line Items]
Deferred revenues	$ 31,392	$ 34,184
Accrued expenses	29,544	29,999
Dividends payable	13,467	13,634
Accrued income taxes	14,921	2,920
Other	39,128	30,303
Total	$ 128,452	$ 111,040