Selected Segment Financial Data, Revenues and Income (Loss) Before Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Assets	$ 1,614,204	$ 1,681,851
Americas - United States | Operating Segments
Segment Reporting Information [Line Items]
Assets	1,091,472	1,129,064
Americas - Other | Operating Segments
Segment Reporting Information [Line Items]
Assets	38,375	39,995
EMEA | Operating Segments
Segment Reporting Information [Line Items]
Assets	361,477	380,320
Asia/Pacific | Operating Segments
Segment Reporting Information [Line Items]
Assets	$ 122,880	$ 132,472