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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 05, 2014 | Jan. 12, 2012
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Allowance for doubtful accounts | $ 12,300,000 | $ 7,300,000 |  |  |
Product warranty expense | 50,400,000 | 28,900,000 | $ 35,400,000 |  |
Accrued product warranty | 153,063,000 | 138,992,000 | 92,064,000 |  |
Interest rate swap, accumulated other comprehensive loss | (4,015,000) | 2,957,000 |  |  |
Foreign exchange transaction losses recognized in other (expense) income, net | 6,618,000 | 4,001,000 | 4,659,000 |  |
Net income attributable to noncontrolling interest | 29,000 | 8,517,000 | 0 |  |
Unbilled accounts receivable | 366,168,000 | 274,912,000 |  |  |
Customer deposits | 369,716,000 | 256,591,000 |  |  |
Provisions for loss contracts | 94,000,000 | 60,500,000 |  |  |
Deferred pre-production costs | 20,200,000 | 29,400,000 |  |  |
Research and development costs | 95,166,000 | 71,375,000 | $ 71,213,000 |  |
Interest rate swap agreements |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Interest rate swap agreements, notional amount | 150,000,000 |  |  | $ 150,000,000.0 | $ 150,000,000.0
Interest rate swap agreement, current liability | $ 1,163,000 | $ 3,888,000 |  |  |

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- Definition Deferred incremental direct costs incurred typically at a contract's inception so that the company may be in a position to fulfill all contractual obligations of an arrangement. The costs are directly related to specified activities under the arrangement and are deferred in order to match revenue that will be recognized after one year from the balance sheet date (or one operating cycle if longer). Excludes start-up costs (such as one-time activities related to opening a new facility, introducing a new product or service, establishing business with a new class of customers, preopening costs, and organization costs), which are expensed as incurred. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3(f).Q3) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3(f).Q4) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 + Details
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