Background and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2016

Accounting Policies [Abstract]

Summary of Activity in Product Warranty Accrual, Included in Other Accrued Liabilities

The following table summarizes the activity in the product warranty accrual, included in other accrued liabilities:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2016			2015			2016			2015
Product warranty accrual, beginning of period	$	17,689		$	15,366		$	17,964		$	17,054
Provision for warranty claims		2,468			2,372			4,519			3,914
Warranty claims paid		(1,801	)		(2,544	)		(4,127	)		(5,774	)
Product warranty accrual, end of period	$	18,356		$	15,194		$	18,356		$	15,194

Summary of Earnings, Weighted Average Common Shares and Potential Common Shares Outstanding

The following table presents the basis for the earnings per share computations:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Numerator:
Net income for basic and diluted earnings per share	$	61,961	$	45,592	$	74,541	$	85,068
Denominator:
Weighted average shares outstanding - basic		192,241		189,682		191,996		189,084
Dilutive effect of equity-based awards		3,832		4,322		3,819		4,486
Weighted average common shares outstanding - diluted		196,073		194,004		195,815		193,570
Earnings per share:
Basic	$	0.32	$	0.24	$	0.39	$	0.45
Diluted	$	0.32	$	0.24	$	0.38	$	0.44