OTHER INVESTMENTS (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Schedule of Investments [Line Items]
Interest rate	10.00%
Notes receivable, gross	$ 44,759	[1]	$ 50,377	[1]
Allowance for loss on notes receivable	(1,977)		(1,977)
Notes receivable, net	42,782		48,400
Marketable securities and other	4,557		4,557
Other investments - net	47,339		52,957
Infinia on demand
Schedule of Investments [Line Items]
Notes receivable, gross			225
Other Investment note due 2015
Schedule of Investments [Line Items]
Notes receivable, gross	2,518		2,718
Other Investment notes due 2021 - 2023
Schedule of Investments [Line Items]
Notes receivable, gross	9,775		4,996
Other Investment note due 2013
Schedule of Investments [Line Items]
Notes receivable, gross	1,018	[2]	12,938	[2]
Other Investment note due 2014
Schedule of Investments [Line Items]
Notes receivable, gross	812		1,500
$28.0 million Other Investment note due 2017
Schedule of Investments [Line Items]
Notes receivable, gross	26,500		28,000
$4.0 Million Other Investment note due 2013
Schedule of Investments [Line Items]
Notes receivable, gross	3,450
Other Investment note due 2013
Schedule of Investments [Line Items]
Notes receivable, gross	261
$1.3 million Other Investment note due 2017
Schedule of Investments [Line Items]
Notes receivable, gross	$ 425

[1] The majority of these notes bear interest at approximately 10% annually.

[2] The Formation note was assumed by Genesis on January 1, 2012.