Note 5 - Marketable Securities (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jul. 01, 2011	Jun. 30, 2012	Jul. 01, 2011
Investment Committee Description		The Investment Committee is authorized, among other things, to invest the Company's excess cash directly or allocate investments to outside managers for investment in equity or debt securities, provided that the Investment Committee may not invest more than $25 million in any single investment or with any single asset manager without the Board's approval.
Available-for-sale Securities, Gross Realized Gains	$ 1.5	$ 0.1	$ 2.0
Available-for-sale Securities, Gross Realized Losses	0.2		0.3
Oilfield Serving, Energy Services, and Related Business [Member]
Maximum Amount Available for Investing		$ 10

The Investment Committee is authorized, among other things, to invest the Company's excess cash directly or allocate investments to outside managers for investment in equity or debt securities, provided that the Investment Committee may not invest more than $25 million in any single investment or with any single asset manager without the Board's approval.

Available-for-sale Securities, Gross Realized Losses

0.2

0.3

Maximum Amount Available for Investing

$ 10