Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill during 2014 and 2013 were as follows (in millions):

	Year Ended December 31,
	2014		2013
Goodwill, beginning of year	$	22.9	$	22.8
Davenport acquisition adjustments	—		0.1
Goodwill, end of year	$	22.9	$	22.9

Schedule of Finite-Lived Intangible Assets

Intangible assets with definite lives are generally amortized on a straight-line basis over the following lives:

	Useful Life in Years
Customer relationships	10-15
Non-competition agreements	1-5
Software	3-7

The carrying amount and accumulated amortization of other intangible assets as of December 31, 2014 and 2013 are as follows (in millions):

	December 31, 2014							December 31, 2013
	Gross					Net		Gross					Net
	Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	Amount		Amortization			Amount		Amount		Amortization			Amount
Customer relationships	$	21.1	$	(5.6	)	$	15.5	$	21.1	$	(4.1	)	$	17.0
Non-competition agreements	3.2		(2.4		)	0.8		3.2		(1.8		)	1.4
Internally developed and other purchased software	16.3		(10.0		)	6.3		11.9		(9.5		)	2.4
Total other intangible assets	$	40.6	$	(18.0	)	$	22.6	$	36.2	$	(15.4	)	$	20.8

Schedule of Expected Amortization Expense

Estimated future amortization expense for intangible assets is as follows (in millions):

Year ending December 31,
2015	$	2.8
2016	2.7
2017	2.5
2018	2.3
2019	2.3