DERIVATIVE AND HEDGING INSTRUMENTS - Effect of Derivative Financial Instruments on the Condensed Consolidated Statements of Income and Condensed Consolidated Statements of Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, cash flow hedges	$ 3,338	$ 97	$ 13,236	$ 825
Gain (loss) recognized in other comprehensive income, cash flow hedges and net investment hedges	6,657	(2,891)	19,062	(4,322)
Gain (loss) reclassified from accumulated other comprehensive income into income, cash flow hedges and net investment hedges	633	(399)	583	(869)
Interest rate products
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, cash flow hedges	4,009	(136)	13,132	125
Interest rate products | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from accumulated other comprehensive income into income, cash flow hedges	633	(399)	583	(869)
Foreign currency products
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, net investment hedges	898	(242)	1,505	(1,159)
Gain (loss) reclassified from accumulated other comprehensive income into income, net investment hedges	0	0	0	0
CAD term loan
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, net investment hedges	1,750	(2,513)	4,425	(3,288)
Gain (loss) reclassified from accumulated other comprehensive income into income, net investment hedges	$ 0	$ 0	$ 0	$ 0