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Borrowings and Lines of Credit Borrowings and lines of Credit (Current Year Actions) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Debt Instrument [Line Items]        
Average Years of Maturity of Long Term Debt     twelve years  
Average interest expense rate 3.60% 4.00% 3.60% 4.10%