- Net Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred income taxes:
Inventories	$ 11,072	$ 13,252
Accrued expenses	102,308	152,798
Derivative instruments	10
Derivative instruments		(175)
Cost in excess of net assets of business acquired	(15,171)	(10,257)
Property and equipment	(52,757)	(56,240)
Compensation payable in common stock	55,350	73,297
Net operating loss carryforwards and impairments	13,628	13,650
Valuation allowance	(9,057)	(6,981)
Total net deferred income tax asset	$ 105,383	$ 179,344