Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments And Contingencies Disclosure [Line Items]
Rent expense under company's operating leases	$ 5,992	$ 5,996	$ 3,243
Rights and ownership purchase of intellectual property			37
Expected future payments	1,312
Patents
Commitments And Contingencies Disclosure [Line Items]
Rights and ownership purchase of intellectual property	7,000
Number of Quarterly Installment Payments	9
Johnson Controls
Commitments And Contingencies Disclosure [Line Items]
Installment payments	$ 1,688