Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts, accounts receivable	$ 338	$ 1,442
Preferred shares, par value	$ 0.10	$ 0.10
Preferred shares, shares authorized	5,000	5,000
Preferred shares, issued
Common shares, par value	$ 0.10	$ 0.10
Common shares, shares authorized	145,000	145,000
Common shares, issued	53,936	55,297
Common shares, outstanding	53,825	55,186
Treasury shares, shares	111	111