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Commitments and Contingencies - Schedule of Warranty Reserves (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty reserves, beginning of period	$ 24,449us-gaap_ProductWarrantyAccrual	$ 24,485us-gaap_ProductWarrantyAccrual	$ 26,404us-gaap_ProductWarrantyAccrual
Warranty reserves accrued	11,659us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease	8,102us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease	5,423us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease
Liabilities assumed in the Merger	7,481us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition
Adjustments to pre-existing reserves	199us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease	1,933us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease	2,650us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease
Warranty expenditures	(10,518)us-gaap_ProductWarrantyAccrualPayments	(10,071)us-gaap_ProductWarrantyAccrualPayments	(9,992)us-gaap_ProductWarrantyAccrualPayments
Warranty reserves, end of period	$ 33,270us-gaap_ProductWarrantyAccrual	$ 24,449us-gaap_ProductWarrantyAccrual	$ 24,485us-gaap_ProductWarrantyAccrual

X

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph ((c)(5))

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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- Definition

Total liability for standard and extended product warranties acquired in a business acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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- Definition

Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph ((c)(2))

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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- Definition

Total increases or decreases in the standard and extended product warranty liability during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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- Definition

Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard and extended product warranties (including adjustments for changes in estimates).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph ((c)(4))

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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