Provision for Income Taxes for Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Currently payable
Federal	$ 51,158	$ 44,766	$ 10,502
State	6,980	6,591	2,456
International	24,005	17,877	13,947
Total current taxes	82,143	69,234	26,905
Deferred
Federal and state	419	26,445	26,733
International	(9,503)	1,521	2,790
Total deferred taxes	(9,084)	27,966	29,523
Total provision for income taxes	$ 73,059	$ 97,200	$ 56,428