Other Long Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Long Term Liabilities [Line Items]
Intangible lease liability	$ 6,578	$ 6,965
Accrued workers' compensation	14,726	15,188
Accrued deferred compensation	9,850	13,253
Lease financing obligation	18,832	21,047
Other	1,856	1,856
Other liabilities	$ 51,842	$ 58,309