Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Allowance for losses	$ 1,200	$ 1,743
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	100,000,000	100,000,000
Common shares, shares issued	59,381,636	58,989,578
Treasury stock, shares	3,100,419	3,070,720