Segments and Geographic Information - Revenues for the Company's Products and Services (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 1,286,340	$ 1,327,523	$ 1,263,460
Outsourced Customer Contract Management Services [Member]
Segment Reporting Information [Line Items]
Revenues	1,261,465	1,303,607	1,240,328
Fulfillment Services [Member]
Segment Reporting Information [Line Items]
Revenues	21,434	18,392	16,953
Enterprise Support Services [Member]
Segment Reporting Information [Line Items]
Revenues	$ 3,441	$ 5,524	$ 6,179

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration