BORROWING ARRANGEMENTS - Secured Borrowings (Narrative) (Detail) (USD $)	12 Months Ended						3 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended		3 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010		Jun. 30, 2012 2011 Credit Facility	Dec. 31, 2010 Senior notes due, 2014	Jun. 29, 2010 Secured borrowings HUD Berkadia mortgages assumed June 2010	Dec. 31, 2012 Secured borrowings HUD Berkadia mortgages assumed June 2010	Dec. 31, 2011 Secured borrowings HUD Berkadia mortgages assumed June 2010	Jun. 29, 2010 Secured borrowings HUD Capital Funding mortgages assumed June 2010	Dec. 31, 2012 Secured borrowings HUD Capital Funding mortgages assumed June 2010	Dec. 31, 2011 Secured borrowings HUD Capital Funding mortgages assumed June 2010	Oct. 31, 2011 Secured borrowings HUD mortgages assumed October 2011	Dec. 31, 2012 Secured borrowings HUD mortgages assumed October 2011	Dec. 31, 2011 Secured borrowings HUD mortgages assumed October 2011	Jun. 29, 2012 Secured borrowings HUD mortgages assumed December 2011	Dec. 23, 2011 Secured borrowings HUD mortgages assumed December 2011	Dec. 31, 2012 Secured borrowings HUD mortgages assumed December 2012
Borrowing Arrangements [Line Items]
Assumed indebtedness, maturity date									January 2036 and May 2040			January 2040 and January 2045			April 2036 and September 2040				October 2029 to July 2044	April 2031 and February 2045
Fair value adjustment of HUD debt assumed									$ 13,700,000	$ 11,600,000	$ 12,400,000	$ 7,400,000	$ 6,400,000	$ 6,800,000	$ 3,000,000	$ 2,800,000	$ 3,000,000		$ 1,900,000	$ 10,100,000
Assumption of debt for the acquisition																				71,900,000
Gain on retirement of HUD mortgages																		1,700,000
Gain from write-off of unamortized fair value adjustment of the HUD loans							1,700,000											1,800,000
Prepayment fee	4,896,000	[1]	16,000	[1]	11,251,000	[1]		8,300,000										100,000
Total Hud debt assumed																				81,900,000
Repayment for mortgage retirement																		$ 11,800,000

[1] In 2012, we incurred $4.9 million prepayment penalties and other costs associated with the tender offer and redemption of our $175 million 7% 2016 Notes. In 2010, we made prepayment penalties of: (a) $3.0 million for the early termination of a $100 million GECC term loan and (b) $8.3 million for the tender offer and retirement of our outstanding $310 million 7% Senior Notes due 2014.