RELATED PARTY TRANSACTIONS (Details) (USD $) In Millions, except Share data, unless otherwise specified				12 Months Ended			12 Months Ended			3 Months Ended		12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Class B Common Stock	May 31, 2013 Class B Common Stock	Dec. 31, 2012 Cadillac Fairview	Dec. 31, 2011 Cadillac Fairview	Dec. 31, 2013 Cadillac Fairview item	Dec. 31, 2013 Ontrea item	Dec. 31, 2012 Ontrea	Dec. 31, 2011 Ontrea	Mar. 31, 2011 OTPP	Dec. 31, 2012 OTPP Maximum	Dec. 31, 2013 OTPP Class B Common Stock	Dec. 31, 2011 OTPP Class B Common Stock	Aug. 09, 2012 Ares	Mar. 31, 2011 ACOF Operating Manager	Dec. 31, 2013 ACOF Operating Manager	Dec. 31, 2011 ACOF Operating Manager
Related party transaction
Amount of annual management fee, payable on a quarterly basis																$ 0.8
Period up to which quarterly payment of annual management fee to be made from the date of merger																10 years
Period of extension for payment of management fee after tenth anniversary from date of merger																1 year
Amount of management fee paid																	0.2
Net present value of management fee paid on consummation of IPO															5.6
Amount of annual special dividend payable												0.8
Special Dividend Period												10 years
Amount of special dividend paid													0.2
Net present value of special dividend paid on consummation of IPO										5.6
Common stock, shares outstanding	94,000,000	0	0
Number of shares of common stock owned by related party											10,000
Number of lease agreements entered into by the company						16	1
Amount paid under lease agreements				$ 2.4	$ 2.4		$ 0.2	$ 0.2	$ 0.2
Number of shares authorized to be repurchased														6,000,000
Repurchase price per share (in dollars per share)														$ 38.42