Net Deferred Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current deferred income taxes:
Inventories	$ 6,306	$ 7,277
Accrued expenses	87,157	78,164
Derivative instruments	(107)	851
Total current	93,356	86,292
Noncurrent net deferred income taxes:
Cost in excess of net assets of business acquired	(13,594)	5,193
Property and equipment	(36,069)	(21,656)
Compensation payable in common stock	42,385	40,329
Net unrealized gains in other comprehensive income	143	(1,698)
Net operating loss carryforwards	5,782	4,744
Valuation allowance	(5,059)	(4,523)
Total noncurrent	(6,412)	22,389
Total	$ 86,944	$ 108,681