Fair value measurement (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial asset	$ 37	$ 751
Carrying Amount [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	367,289	326,113
Restricted Cash	164,371	1,036,339
Carrying Amount [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan receivables	11,749	7,267
Carrying Amount [Member] | Recurring [Member] | Level 2 [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial asset	37
Carrying Amount [Member] | Recurring [Member] | Level 3 [Member] | Deal Contingent Forward Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial asset		751
Derivative financial liability		2,005
Deal contingent forward		2,005
Fair Value [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	367,289	326,113
Restricted Cash	164,371	1,036,339
Fair Value [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan receivables	11,678	7,267
Fair Value [Member] | Recurring [Member] | Level 2 [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial asset	37
Fair Value [Member] | Recurring [Member] | Level 3 [Member] | Deal Contingent Forward Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial asset		751
Derivative financial liability		2,005
Deal contingent forward		2,005
Short-term Debt [Member] | Carrying Amount [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	8,637	6,147
Short-term Debt [Member] | Fair Value [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	8,637	6,147
Long-term Debt [Member] | 2016 Notes [Member] | Carrying Amount [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	495,434	494,531
Long-term Debt [Member] | 2016 Notes [Member] | Fair Value [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	489,800	508,125
Long-term Debt [Member] | 2021 USD Notes [Member] | Carrying Amount [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument		598,052
Long-term Debt [Member] | 2021 USD Notes [Member] | Fair Value [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument		625,125
Long-term Debt [Member] | 2021 CAD Notes [Member] | Carrying Amount [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument		332,337
Long-term Debt [Member] | 2021 CAD Notes [Member] | Fair Value [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument		339,100
Delayed Draw Term Loans [Member] | Long-term Debt [Member] | Carrying Amount [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	91,989	92,821
Delayed Draw Term Loans [Member] | Long-term Debt [Member] | Fair Value [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	92,348	93,226
Revolver Loan [Member] | Long-term Debt [Member] | Carrying Amount [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	56,949	219,699
Revolver Loan [Member] | Long-term Debt [Member] | Fair Value [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	$ 57,000	$ 219,772