Stock Compensation Plans (Details) - Jun. 30, 2015 - Performance Based Stock And Share Unit - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		Total	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Stock compensation performance period		1 year
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Unvested performance stock unit awards, at December 31, 2014 (Target Number of Units)	[1]		0
Unvested performance stock unit awards, at December 31, 2014 (Weighted Average Fair Value)			$ 0.00
2015 Performance Awards granted (Target Number of Units)	[1]	217
2015 Performance Awards granted (Weighted Average Fair Value)		$ 18.10
2015 Performance Awards forfeited (Target Number of Units)	[1]	(3)
2015 Performance Awards forfeited (Weighted Average Fair Value)		$ 18.23
Unvested performance stock unit awards, at March 31, 2015 (Target Number of Units)	[1]	214	214
Unvested performance stock unit awards, at March 31, 2015 (Weighted Average Fair Value)		$ 18.10	$ 18.10
Maximum Potential Shares Earned		428
Compensation cost, share based awards		$ 0.8	$ 1.1
Nonvested awards, compensation cost not yet recognized		$ 3.4	$ 3.4
Nonvested awards, compensation cost not yet recognized, period for recognition			2 years 7 months 24 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock compensation units earned range			0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock compensation units earned range			200.00%

[1] (a) For the 2015 Performance Awards, participants in the aggregate can earn up to a maximum of 428 thousand performance stock units.