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
	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, cash flow hedges	$ 9,898	$ 728
Gain (loss) recognized in other comprehensive income, cash flow hedges and net investment hedges	12,405	(1,432)
Gain (loss) reclassified from accumulated other comprehensive income into income, cash flow hedges and net investment hedges	(50)	(470)
Interest rate products
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, cash flow hedges	9,123	259
Interest rate products | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from accumulated other comprehensive income into income, cash flow hedges	(50)	(470)
Foreign currency products
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, net investment hedges	607	(916)
Gain (loss) reclassified from accumulated other comprehensive income into income, net investment hedges	0	0
CAD term loan
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, net investment hedges	2,675	(775)
Gain (loss) reclassified from accumulated other comprehensive income into income, net investment hedges	$ 0	$ 0