STOCKHOLDERS' DEFICIENCY - Common and Treasury Stock Issued and/or Outstanding (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Withholding of restricted stock to satisfy taxes	89,620	92,092	82,740
Common Stock | Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	53,956,073	54,088,174	53,925,029
Restricted stock grants	853,111	125,540	220,635
Restricted stock forfeitures	(253,084)	(257,641)	(57,490)
Withholding of restricted stock to satisfy taxes	0	0	0
Treasury stock repurchased		0
Ending balance	54,556,100	53,956,073	54,088,174
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,024,908	859,921	777,181
Restricted stock grants	0	0	0
Restricted stock forfeitures	0	0	0
Withholding of restricted stock to satisfy taxes	89,620	92,092	82,740
Treasury stock repurchased		72,895
Ending balance	1,114,528	1,024,908	859,921
Treasury Stock | Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Withholding of restricted stock to satisfy taxes		92,092	82,740