Segment Information - Selected Segment Financial Data, Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Long lived assets	$ 1,511,256	$ 1,382,245
Assets	1,990,212	1,850,700
Americas - United States [Member]
Segment Reporting Information [Line Items]
Assets	1,196,733	1,210,673
Americas - United States [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Long lived assets	923,871	929,459
Americas - Other [Member]
Segment Reporting Information [Line Items]
Assets	33,492	32,595
Americas - Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Long lived assets	11,643	15,337
EMEA [Member]
Segment Reporting Information [Line Items]
Assets	643,275	487,629
EMEA [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Long lived assets	502,785	360,033
Asia/Pacific [Member]
Segment Reporting Information [Line Items]
Assets	116,712	119,803
Asia/Pacific [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Long lived assets	$ 72,957	$ 77,416