Share-Based Compensation Plans (Details 1) - $ / shares shares in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Summary of the changes in outstanding stock options
Outstanding, beginning of period (in shares)	2,989
Granted (in shares)	677
Exercised (in shares)	(348)
Forfeited (in shares)	(49)
Outstanding, end of period (in shares)	3,269	2,989
Options exercisable, ending of period (in shares)	2,121
Vested and expected, end of period (in shares)	3,107
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of period (in usd per share)	$ 28.60
Granted (in usd per share)	36.00
Exercised (in usd per share)	27.26
Forfeited (in usd per share)	33.14
Outstanding, end of period (in usd per share)	30.22	$ 28.60
Options exercisable, end of period (in usd per share)	27.38
Vested and expected, end of period (in usd per share)	$ 29.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Roll Forward]
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	6 years 11 months	6 years 6 months
Granted	10 years
Exercised	5 years 2 months
Forfeited	8 years 6 months
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	6 years 11 months	6 years 6 months
Options exercisable, end of period	5 years 10 months
Vested and expected to vest, end of period	6 years 10 months