Significant Accounting Policies - Narrative (Details) shares in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) unit segment shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Jan. 01, 2019 USD ($)	Jan. 01, 2018 USD ($)
Accounting Policies [Abstract]
Number of reportable segments | segment	3
Advertising costs	$ 17,000,000	$ 15,800,000	$ 15,300,000
Asset impairments	$ 0	$ 0	$ 205,000
Number of reporting units | unit	13
Option to purchase common stock shares not included in the computation of diluted EPS (in shares) | shares	0.3	0.0	0.9
Engineering expense	$ 84,900,000	$ 76,400,000	$ 68,800,000
Research and development expense	48,000,000	42,400,000	39,400,000
Business Combination, Separately Recognized Transactions [Line Items]
Foreign currency transaction (gain) loss	$ (2,400,000)	20,500,000	$ (6,200,000)
Percentage of concentration risk	2.00%
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current assets	$ 33,938,000	74,203,000
Deferred income taxes	128,007,000	137,638,000
Retained earnings	$ 2,342,079,000	2,057,915,000
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption		0
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption		(645,000)
Other current assets					$ (7,300,000)
Deferred income taxes					(6,700,000)
Retained earnings					(600,000)
Accounting Standards Update 2016-02 | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset				$ 70,000,000
Operating lease, liability				70,000,000
Finance lease, right-of-use asset				70,000,000
Finance lease, liability				$ 70,000,000
Retained Earnings | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption		6,435,000
Retained Earnings | Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption		(645,000)
New Accounting Pronouncement, Early Adoption, Effect | Retained Earnings | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption					(6,400,000)
New Accounting Pronouncement, Early Adoption, Effect | AOCI Attributable to Parent | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 6,400,000
SFC-Koenig
Business Combination, Separately Recognized Transactions [Line Items]
Foreign currency transaction (gain) loss		$ 20,200,000