Accrued Expenses - Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued wages	$ 57,472	$ 52,311
Accrued phone	42,549	45,501
Interest payable	36,440	44,523
Accrued other taxes (non-income related)	39,267	39,249
Acquisition obligation for NOL carryforward claim	5,536
Accrued employee benefit costs	3,970	5,039
Accrued lease expense	2,616	3,216
Accrued licensing costs	2,418	984
Acquisition contingent consideration	2,075
Deferred income tax	1,692	1,117
Acquisition obligation for NOL carryback claim		6,115
Income taxes payable		1,045
Other current liabilities	26,891	29,324
Total	$ 220,926	$ 228,424