Stockholders' Equity - Secondary Offering (Details) - Common Class A - $ / shares	1 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	0	0
Majority Shareholder | Wengen Alberta
Subsidiary, Sale of Stock [Line Items]
Sale of stock, price per share (in dollars per share)	$ 16.85	$ 15.3032
Majority Shareholder | Wengen Alberta | Secondary Offering
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	15,000,000	10,955,000