Selling, General and Administrative Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Component of Operating Other Cost and Expense [Abstract]
Selling, general and administrative expenses	$ 160,149	$ 148,748
Personnel expenses
Component of Operating Other Cost and Expense [Abstract]
Selling, general and administrative expenses	108,400	105,838
Operational expenses
Component of Operating Other Cost and Expense [Abstract]
Selling, general and administrative expenses	49,578	40,562
Depreciation and amortization
Component of Operating Other Cost and Expense [Abstract]
Selling, general and administrative expenses	$ 2,171	$ 2,348

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=51677171&loc=d3e3636-108311

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration