DEBT OBLIGATIONS AND CREDIT FACILITIES - Debt Obligations (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total remaining principal	$ 800,000	$ 850,000
Less: Debt issuance costs	(4,042)	(3,646)
Debt obligations	795,958	846,354
6.09%
Debt Instrument [Line Items]
Total remaining principal	0	50,000
5.82%
Debt Instrument [Line Items]
Total remaining principal	50,000	50,000
6.75%
Debt Instrument [Line Items]
Total remaining principal	250,000	250,000
Term Loan, Variable Rate
Debt Instrument [Line Items]
Total remaining principal	250,000	250,000
3.91%
Debt Instrument [Line Items]
Total remaining principal	50,000	50,000
4.01%
Debt Instrument [Line Items]
Total remaining principal	100,000	100,000
4.21%
Debt Instrument [Line Items]
Total remaining principal	$ 100,000	$ 100,000