Equity Method Investments (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
ICP Limited Liability Company [Member]
Schedule of Equity Method Investments [Line Items]
EBITDA		$ 500,000
Right to end operations, 3 quarter aggregate EBITDA losses threshold amount	1,500,000
Net working capital	$ 2,500,000
ICP [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage (percent)	30.00%
DMI [Member]
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage (percent)	50.00%