FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2012

FAIR VALUE MEASUREMENTS

Schedule of estimated fair value of financial instruments

	December 31, 2012						December 31, 2011
	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Cash and cash equivalents	$	80,190		$	80,190		$	45,541		$	45,541
Restricted cash and cash equivalents		29,414			29,414			12,451			12,451
Accounts receivable, net		11,488			11,488			5,474			5,474
Accounts payable		(2,741	)		(2,741	)		(9,072	)		(9,072	)
Accrued expenses		(19,960	)		(19,960	)		(16,712	)		(16,712	)
Surety bonds		—			(5,435	)		—			(5,487	)