CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Allowance for doubtful accounts (in dollars)	$ 3,153	$ 2,964
Shareowners' equity:
Common shares, authorized	65,000	65,000
Common shares, par value (in dollars per share)	$ 0.10	$ 0.10
Common shares, outstanding	23,438	23,339