Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Accrued Liabilities [Line Items]
Accrued interest	$ 2,972	$ 7,275
Accrued compensation and benefits	43,986	50,305
Dividends Payable, Current	11,912	12,011
Other accrued expenses	37,472	37,876
Accrued expenses	$ 96,342	$ 107,467