Plan Information (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) shares
Incentive Compensation Plan Initiation Year	2014
Number of shares initially available for grant	28.8
Maximum shares participants are eligible to receive	2.0
Maximum Cash Award Per Employee | $	$ 10.0
Number of years stock options expire from grant date	10 years
Fair Value of shares on grant date is amortized over vesting period, years	3 years
Minimum [Member]
Stock options exercisable period	2 years
Maximum [Member]
Stock options exercisable period	4 years