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Reconciliation of Income Tax Rate (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Effective Income Tax Rate [Abstract]        
Effective Income Tax Rate Reconciliation, Percent 23.00% 20.80% 23.50% 25.60%