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Stock-Based Compensation (tables)
3 Months Ended
Mar. 31, 2014
Share-based Compensation [Abstract]  
LTIP Assumptions [Table Text Block]
Stock price on valuation date
$
41.78

Performance term (in years)
3.0

Quarterly dividends paid per share
$
0.460

Expected dividend yield
4.3
%
Dividend discount factor
0.8845