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Goodwill and Other Intangible Assets (Intangible Assets) (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 214,810 | $ 173,272
Accumulated Amortization | 59,270 | 40,764
Net Carrying Amount | 155,540 | 132,508
Indefinite-lived other intangible asset | 4,738 | 4,168
Total other intangible assets | 219,548 | 177,440
Other intangible assets, net of amortization | 160,278 | 136,676
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 128,907 | 96,148
Accumulated Amortization | 22,514 | 14,311
Net Carrying Amount | 106,393 | 81,837
Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 73,891 | 68,880
Accumulated Amortization | 33,491 | 24,365
Net Carrying Amount | 40,400 | 44,515
Trademarks and patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 10,213 | 6,825
Accumulated Amortization | 2,157 | 1,156
Net Carrying Amount | 8,056 | 5,669
Covenant not to compete |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,799 | 1,419
Accumulated Amortization | 1,108 | 932
Net Carrying Amount | $ 691 | $ 487

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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