Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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PRODUCTS AND SERVICES AND GEOGRAPHIC INFORMATION Summary Information of Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 676,947us-gaap_Revenues	$ 667,877us-gaap_Revenues	$ 640,822us-gaap_Revenues	$ 569,955us-gaap_Revenues	$ 567,899us-gaap_Revenues	$ 534,579us-gaap_Revenues	$ 526,525us-gaap_Revenues	$ 513,804us-gaap_Revenues	$ 2,555,601us-gaap_Revenues	$ 2,142,807us-gaap_Revenues	$ 1,913,149us-gaap_Revenues
Income before income taxes									487,568	477,746	417,197
Assets	4,401,722us-gaap_Assets				3,887,973us-gaap_Assets				4,401,722us-gaap_Assets	3,887,973us-gaap_Assets	3,546,738us-gaap_Assets
Property, Plant and Equipment, less accumulated depreciation of $364,124 in 2014 and $323,031 in 2013	460,408us-gaap_PropertyPlantAndEquipmentNet				358,967us-gaap_PropertyPlantAndEquipmentNet				460,408us-gaap_PropertyPlantAndEquipmentNet	358,967us-gaap_PropertyPlantAndEquipmentNet	335,870us-gaap_PropertyPlantAndEquipmentNet
United States
Segment Reporting Information [Line Items]
Revenues									1,796,796	1,506,587	1,370,806
Income before income taxes									436,229	404,620	359,748
Assets	3,008,547				2,541,323				3,008,547	2,541,323	2,427,297
Property, Plant and Equipment, less accumulated depreciation of $364,124 in 2014 and $323,031 in 2013	297,558				214,810				297,558	214,810	207,387
International [Member]
Segment Reporting Information [Line Items]
Revenues									758,805	636,220	542,343
Income before income taxes									51,339	73,126	57,449
Assets	1,393,175				1,346,650				1,393,175	1,346,650	1,119,441
Property, Plant and Equipment, less accumulated depreciation of $364,124 in 2014 and $323,031 in 2013	162,850				144,157				162,850	144,157	128,483
International [Member] \| Europe [Member]
Segment Reporting Information [Line Items]
Revenues									407,082	341,387	301,615
Property, Plant and Equipment, less accumulated depreciation of $364,124 in 2014 and $323,031 in 2013	70,621				74,915				70,621	74,915	64,690
International [Member] \| Other International Countries [Member]
Segment Reporting Information [Line Items]
Revenues									351,723	294,833	240,728
Property, Plant and Equipment, less accumulated depreciation of $364,124 in 2014 and $323,031 in 2013	$ 92,229				$ 69,242				$ 92,229	$ 69,242	$ 63,793