Plan Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Incentive Compensation Plan Initiation Year	2014
Number of shares initially available for grant	28.8
Maximum shares participants are eligible to receive	2.0
Cash Award performance vesting condition	range from 0% to 300% of the target amount
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
Stock options exercisable period	2 years
Maximum
Stock options exercisable period	4 years