Condensed Results of Operations of Mammoth Pacific (Detail) (USD $)	3 Months Ended		9 Months Ended		7 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Aug. 01, 2010 Mammoth Pacific
Condensed statements of operations:
Revenues					$ 11,484,000
Gross margin					2,670,000
Net income					2,528,000
50% of Mammoth net income	(71,000)	(83,000)	(552,000)	942,000	1,264,000
Plus amortization of basis difference					345,000
Equity Method Investment Summarized Financial Information Income (loss) Before Income Taxes, Total					1,609,000
Income tax benefit (expense)	305,000	(11,931,000)	726,000	(6,009,000)	(611,000)
Net income attributable to the Company's stockholders	$ 866,000	$ 32,459,000	$ 24,000	$ 32,860,000	$ 998,000