Stock Compensation Plans (Details) - Performance Based Stock And Share Unit $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares		Sep. 30, 2015 USD ($) $ / shares shares
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)			0	[1]
Unvested performance stock unit awards, at December 31, 2014 (Weighted Average Fair Value) | $ / shares			$ 0.00
2015 Performance Awards granted (Target Number of Units)	217	[1]
2015 Performance Awards granted (Weighted Average Fair Value) | $ / shares	$ 18.10
2015 Performance Awards forfeited (Target Number of Units)	(3)	[1]
2015 Performance Awards forfeited (Weighted Average Fair Value) | $ / shares	$ 18.23
Unvested performance stock unit awards, at March 31, 2015 (Target Number of Units)	214	[1]	214	[1]
Unvested performance stock unit awards, at March 31, 2015 (Weighted Average Fair Value) | $ / shares	$ 18.10		$ 18.10
Maximum Potential Shares Earned	428
Compensation cost, share based awards | $	$ 1.7		$ 2.8
Nonvested awards, compensation cost not yet recognized | $	$ 2.5		$ 2.5
Nonvested awards, compensation cost not yet recognized, period for recognition			1 year 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.