Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Allowance for Doubtful Accounts

The following table represents a rollforward of the allowance for credit losses for the years ended December 31, 2021, 2020 and 2019:

	Years Ended December 31,
(in millions)	2021		2020		2019
Allowance balance, beginning of year	$	1.7	$	1.4	$	1.2
Provision	0.7		0.9		1.2
Write offs	(0.4)		(0.6)		(1.0)
Allowance balance, end of year	$	2.3	$	1.7	$	1.4

Property, Plant and Equipment

Property and equipment are primarily depreciated over the following useful lives:

	Years
Buildings and improvements	5 - 40
Airplanes and aviation equipment	5 - 20
Machinery, equipment and tooling	3 - 10
Furniture and fixtures	5 - 10
Computer hardware and software	3 - 5

Property and equipment at cost, less accumulated depreciation, is as follows:

	December 31,
(in millions)	2021		2020
Land	$	13.9	$	15.6
Building and land improvements	154.3		148.3
Construction in progress	7.6		3.1
Manufacturing and office equipment	239.2		238.7
Aviation equipment	4.7		4.7
Less accumulated depreciation	(248.0)		(237.6)
Total	$	171.7	$	172.8

Intangible Assets

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

	Years
Dealer network and customer relationships	8 - 18
Trade names	2 - 4
Other	3 - 19

Intangible assets consisted of the following at December 31, 2021 and 2020:

	2021						2020
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Dealer network and customer relationships	$	37.1	$	22.9	$	14.2	$	39.2	$	20.9	$	18.3
Trade names	10.2		7.8		2.4		10.8		4.8		6.0
Other	13.5		7.4		6.1		12.5		5.6		6.9
Total	$	60.8	$	38.1	$	22.7	$	62.5	$	31.3	$	31.2

Computation of Earnings Per Share

The following table sets forth a reconciliation of the number of shares used in the computation of basic and diluted earnings per share:

	Years Ended December 31,
	2021	2020	2019
Denominator:
Denominator for basic earnings per share	22,726,767	22,585,515	22,515,161
Effect of dilutive securities:
Restricted stock units	150,754	185,965	110,974
Unvested performance share units	35,747	65,404	—
Deferred compensation programs	35,364	40,859	48,047
Denominator for diluted earnings per share	22,948,632	22,877,743	22,674,182