Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

v3.8.0.1
Earnings Per Share (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Weighted Average Number of Shares Outstanding, Diluted [Abstract]        
Weighted Average Number of Shares Outstanding, Basic 82,286,295 82,742,070 82,317,244 83,357,449
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements 94,641 69,301 100,313 32,375
Weighted Average Number of Shares Outstanding, Diluted 82,380,936 82,811,371 82,417,557 83,389,824