Note 10 - Segment Information (Detail) - Operating Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Operating Income (Loss)	$ 143,335	$ 133,052	$ 137,215	$ 116,597	$ 122,287	$ 118,680	$ 113,443	$ 89,823	$ 530,200		$ 444,233		$ 347,625
JBI [Member]
Operating Income (Loss)									375,000	[1]	301,000	[1]	237,000	[1]
DCS [Member]
Operating Income (Loss)									116,000	[1]	103,000	[1]	83,000	[1]
ICS [Member]
Operating Income (Loss)									16,000		13,000		9,000
JBT [Member]
Operating Income (Loss)									$ 23,000		$ 27,000		$ 19,000

[1] Includes pretax charges to write down the value of certain assets held for sale of $6.6 million for JBI and $3.7 million for DCS in 2009.