Annual report pursuant to Section 13 and 15(d)

Warranty - Summary of Activity in Warranty Accrual (Detail)

v2.4.1.9
Warranty - Summary of Activity in Warranty Accrual (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Guarantees [Abstract]      
Balance at Beginning of the Year $ 2,796us-gaap_ProductWarrantyAccrual $ 2,551us-gaap_ProductWarrantyAccrual $ 1,092us-gaap_ProductWarrantyAccrual
Warranty Liabilities Acquired 564us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition 671us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition  
Warranties Issued 3,431us-gaap_ProductWarrantyAccrualWarrantiesIssued 722us-gaap_ProductWarrantyAccrualWarrantiesIssued 2,430us-gaap_ProductWarrantyAccrualWarrantiesIssued
Reassessed Warranty Exposure (34)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (222)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease  
Warranties Settled (1,873)us-gaap_ProductWarrantyAccrualPayments (926)us-gaap_ProductWarrantyAccrualPayments (971)us-gaap_ProductWarrantyAccrualPayments
Balance at End of the Year $ 4,884us-gaap_ProductWarrantyAccrual $ 2,796us-gaap_ProductWarrantyAccrual $ 2,551us-gaap_ProductWarrantyAccrual