Consolidated Balance Sheets (Parentheticals) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Common Shares, Par Value	$ 5	$ 5
Common Shares, Authorized	50,000,000	50,000,000
Common Shares, Outstanding	36,267,963	36,168,368
Cumulative Preferred Shares
Cumulative Shares, Authorized	1,500,000	1,500,000
Cumulative Shares, Without Par Value
Cumulative Shares, Outstanding		155,000
Cumulative Preference Shares
Cumulative Shares, Authorized	1,000,000	1,000,000
Cumulative Shares, Without Par Value
Cumulative Shares, Outstanding