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Stock Incentive Plans (Tables)
12 Months Ended
Dec. 31, 2014
Stock Incentive Plans (Tables) [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
Year Ended December 31,
201420132012
Stock options$912$1,113$2,777
Restricted stock31,16319,06415,744
$32,075$20,177$18,521
Non-vested stock incentive awards
Restricted Stock
Number ofWeighted-Average
SharesGrant Date
(000's)Fair Value
Non-vested at December 31, 2013 788$56.92
Vested (553)56.29
Granted 32457.59
Terminated (5)57.20
Non-vested at December 31, 2014 554$57.94