Stockholders' Equity - Secondary Offering (Details)	1 Months Ended	6 Months Ended
	Jun. 30, 2019 $ / shares shares	Jun. 30, 2019 $ / shares shares
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	0
Majority Shareholder | Wengen Alberta
Subsidiary, Sale of Stock [Line Items]
Sale of stock, price per share (in dollars per share) | $ / shares	$ 15.3032	$ 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)		10,955,000