Components of Interest Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument, Redemption [Line Items]
Interest on borrowings and related fees	$ 92,490	$ 91,866	$ 80,263
Amortization of Debt Discount (Premium)	0	0	431
Amortization of debt issuance costs	4,749	4,197	3,413
Capitalized interest	(6,288)	(7,232)	(5,266)
Interest expense	$ 90,951	$ 88,831	$ 78,841