CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY/ACCUMULATED NET PARENT INVESTMENT - USD ($) shares in Thousands	Total	Accumulated net parent investment	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Noncontrolling interest	Class A common stock	Class A common stock Common Stock	Class A common stock Additional paid-in capital	Class A common stock Noncontrolling interest	Class B common stock	Class B common stock Common Stock
Stockholders' equity, beginning balance at Dec. 31, 2018	$ 138,600,000	$ 140,800,000	$ 0	$ 0	$ (2,200,000)	$ 0		$ 0				$ 0
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2018								0				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,700,000
Currency translation	1,900,000				1,900,000
Stockholders' equity, ending balance at Mar. 31, 2019	160,400,000	160,700,000	0	0	(300,000)	0		$ 0				$ 0
Stockholders' equity, ending balance (in shares) at Mar. 31, 2019								0				0
Stockholders' equity, beginning balance at Dec. 31, 2018	138,600,000	140,800,000	0	0	(2,200,000)	0		$ 0				$ 0
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2018								0				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	26,000,000.0
Net income	39,900,000
Currency translation	2,200,000
Stockholders' equity, ending balance at Jun. 30, 2019	220,600,000	0	40,900,000	5,600,000	0	174,000,000.0		$ 0				$ 100,000
Stockholders' equity, ending balance (in shares) at Jun. 30, 2019								22,700				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	0
Distributions To Parent And Affiliates, Net	(311,700,000)
Stockholders' equity, beginning balance at Mar. 31, 2019	160,400,000	160,700,000	0	0	(300,000)	0		$ 0				$ 0
Stockholders' equity, beginning balance (in shares) at Mar. 31, 2019								0				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,700,000	6,700,000
Transactions with Parent and affiliates, net	(3,000,000.0)	(3,000,000.0)
Stockholders' equity, ending balance at May. 07, 2019	170,100,000	170,400,000	0	0	(300,000)	0		$ 0				$ 0
Stockholders' equity, ending balance (in shares) at May. 07, 2019								0				0
Stockholders' equity, beginning balance at Mar. 31, 2019	160,400,000	160,700,000	0	0	(300,000)	0		$ 0				$ 0
Stockholders' equity, beginning balance (in shares) at Mar. 31, 2019								0				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	12,300,000
Net income	26,200,000	13,700,000
Transactions with Parent and affiliates, net	(6,200,000)	(6,200,000)
Currency translation	300,000
Stockholders' equity, ending balance at Jun. 30, 2019	220,600,000	0	40,900,000	5,600,000	0	174,000,000.0		$ 0				$ 100,000
Stockholders' equity, ending balance (in shares) at Jun. 30, 2019								22,700				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	0
Stockholders' equity, beginning balance at May. 07, 2019	170,100,000	170,400,000	0	0	(300,000)	0		$ 0				$ 0
Stockholders' equity, beginning balance (in shares) at May. 07, 2019								0				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,600,000
Net income	19,500,000			5,600,000		13,900,000
Stock-based compensation	3,900,000		800,000			3,100,000
Currency translation	300,000				100,000	200,000
Stockholders' equity, ending balance at Jun. 30, 2019	220,600,000	0	40,900,000	5,600,000	0	174,000,000.0		$ 0				$ 100,000
Stockholders' equity, ending balance (in shares) at Jun. 30, 2019								22,700				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, New Issues								22,700				103,500
Stock Issued During Period, Value, New Issues							$ 332,800,000		$ 59,900,000	$ 272,900,000	$ 100,000	$ 100,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	0	$ (170,400,000)	30,700,000		200,000	139,500,000
Distributions To Parent And Affiliates, Net	(311,700,000)		(56,100,000)			(255,600,000)
Stockholders' Equity, Other	5,600,000		5,600,000
Common stock, shares issued (in shares)							22,700				103,500
Stockholders' equity, beginning balance at Dec. 31, 2019	277,500,000		41,700,000	12,000,000.0	300,000	223,400,000		$ 0				$ 100,000
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2019								22,700				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	31,100,000			4,400,000		26,700,000
Stock-based compensation	100,000		200,000			(100,000)
Currency translation	(800,000)				(200,000)	(600,000)
Stockholders' equity, ending balance at Mar. 31, 2020	307,900,000		41,900,000	16,400,000	100,000	249,400,000		$ 0				$ 100,000
Stockholders' equity, ending balance (in shares) at Mar. 31, 2020								22,700				103,500
Stockholders' equity, beginning balance at Dec. 31, 2019	277,500,000		41,700,000	12,000,000.0	300,000	223,400,000		$ 0				$ 100,000
Stockholders' equity, beginning balance (in shares) at Dec. 31, 2019								22,700				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	11,000,000.0
Net income	79,900,000
Currency translation	100,000
Stockholders' equity, ending balance at Jun. 30, 2020	351,100,000		42,900,000	23,000,000.0	300,000	284,800,000		$ 0				$ 100,000
Stockholders' equity, ending balance (in shares) at Jun. 30, 2020								22,800				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(11,600,000)
Distributions To Parent And Affiliates, Net	(11,600,000)
Stockholders' equity, beginning balance at Mar. 31, 2020	307,900,000		41,900,000	16,400,000	100,000	249,400,000		$ 0				$ 100,000
Stockholders' equity, beginning balance (in shares) at Mar. 31, 2020								22,700				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6,600,000
Net income	48,800,000			6,600,000		42,200,000
Stock-based compensation	5,100,000		1,000,000.0			4,100,000
Currency translation	900,000				200,000	700,000
Stockholders' equity, ending balance at Jun. 30, 2020	351,100,000		$ 42,900,000	$ 23,000,000.0	$ 300,000	284,800,000		$ 0				$ 100,000
Stockholders' equity, ending balance (in shares) at Jun. 30, 2020								22,800				103,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ (11,600,000)					$ (11,600,000)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture							100
Common stock, shares issued (in shares)							22,800				103,500