Business combinations - Schedule of Consideration Transferred, Recapitalization Transaction (Details) - USD ($) $ in Thousands		6 Months Ended
	Mar. 12, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Purchase of all of our Predecessor's cumulative redeemable preferred shares		$ 0	$ 239,492
Ordinary shares (20,000,000 shares at the Acquisition Date closing price of $10.77 per share, €0.10 par value)		$ 215,400	$ 0
Recapitalization Transaction
Business Acquisition [Line Items]
Purchase of all of our Predecessor's cumulative redeemable preferred shares	$ 353,873
Net cash transferred from Pace	78,859
Ordinary shares (20,000,000 shares at the Acquisition Date closing price of $10.77 per share, €0.10 par value)	799
Total consideration transferred	$ 433,531
Number of shares agreed to purchase in subscription agreements (in shares)	82,751