NET INCOME PER COMMON SHARE - Potentially Dilutive Securities Excluded from Computation of Net Income Per Common Share (Details) In Thousands, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2013
Schedule of Earning Per Share, Basic, by Common Class [Line Items]
Antidilutive convertible preferred shares (in shares)	0	0	16,493
Shares issuable under option awards (in shares)	15	30	10
RSUs (in shares)	0	243	0
7.50% Cumulative Redeemable Preferred Stock, Series E [Member]
Schedule of Earning Per Share, Basic, by Common Class [Line Items]
Preferred stock dividend rate (in hundredths)				7.50%
Redeemable Preferred Stock [Member] | 7.50% Cumulative Redeemable Preferred Stock, Series E [Member]
Schedule of Earning Per Share, Basic, by Common Class [Line Items]
Preferred stock dividend rate (in hundredths)	7.50%