Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments And Contingencies [Line Items]
Rent expense	$ 46.3	$ 21.5	$ 12.1
Environmental remediation costs expected to be paid	15
Minimum amount of environmental remediation costs in excess of which the company expected to pay	30
Remediation costs incurred	3.1
Environmental liabilities	4.0	5.5
NUMMI [Member]
Commitments And Contingencies [Line Items]
Environmental remediation costs expected to be paid by a seller after the first amount is paid by company	15
Maximum amount that can be spent on remediation activities	$ 30
Agreement term for governmentally required remediation activities for contamination, year	10 years
Minimum [Member]
Commitments And Contingencies [Line Items]
Terms of agreements to lease equipment under capital leases in months	36 months
Maximum [Member]
Commitments And Contingencies [Line Items]
Terms of agreements to lease equipment under capital leases in months	60 months
California Lease Facility [Member]
Commitments And Contingencies [Line Items]
Leased facility square feet	350,000
Lease expiration of facility	Jan. 01, 2020
Tilburg, Netherlands Lease Facility [Member]
Commitments And Contingencies [Line Items]
Leased facility square feet	203,772
Lease expiration of facility	Nov. 30, 2023