Equity and Cost Method Businesses - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Schedule Of Equity Method Investments [Line Items]
Net asset of equity method	$ 1,000,000		$ 1,300,000
Net asset allocated of equity method goodwill	300,000		600,000
Allocated of equity method intangible	700,000		700,000
Amortized period			5 years
Amortization of intangible assets	48,000	[1]	21,000	[2]
Carrying value of holdings in cost method companies	19,600,000		19,600,000
Anthem
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	9.00%
Less Than
Schedule Of Equity Method Investments [Line Items]
Amortization of intangible assets	$ 100,000	[1]	$ 100,000	[2]
Equity method investment, ownership percentage	50.00%

[1] Includes Acquirgy and CIML

[2] Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence