Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		1 Months Ended	6 Months Ended		1 Months Ended
	Jun. 30, 2012 LegalMatter Segment	Mar. 31, 2011	Jan. 31, 2011 Compensatory damages Customer	Jun. 30, 2012 Pending Litigation LegalMatter	Jun. 30, 2012 Investacorp Inc	Jul. 16, 2012 Future Period
Loss Contingencies [Line Items]
Damages sought by plaintiff			$ 442	$ 880	$ 806
Former clients of filed an arbitration claim			2
Number of arbitration claims settled	8
Number of remaining arbitration claims				3
Number of lawsuits filed				1
Total investment amount		12,000
Award against Triad						260
Accrued Liabilities	$ 158