Summary of Accrued (Detail) - USD ($)		6 Months Ended
		Jun. 30, 2015	Dec. 31, 2014
Summary Of Expenses [Line Items]
Adjustments recorded during the period	[1]	$ (1,404,000)
Payments during the period		(2,823,000)
Accrued Balance		$ 2,307,000	$ 6,534,000

[1] The adjustments to the accrual recorded in the first half of 2015 relate primarily to favorable termination agreements reached with landlords of closed Corporate Medifast Weight Control Centers.