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Basic and diluted net earnings per share - Schedule of Earnings per Share (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Class of Stock [Line Items]    
Net earnings attributable to shareholders of APUC $ 530,884 $ 184,988
Series A and D Preferred shares dividend 8,486 8,027
Net earnings attributable to common shareholders of APUC from continuing operations – basic and diluted $ 522,398 $ 176,961
Weighted average number of shares    
Basic (in shares) 499,910,876 461,818,023
Effect of dilutive securities (in shares) 4,828,678 4,227,595
Diluted (in shares) 504,739,554 466,045,618
Series A Preferred Stock    
Class of Stock [Line Items]    
Series A and D Preferred shares dividend $ 4,666 $ 4,169
Series D Preferred Stock    
Class of Stock [Line Items]    
Series A and D Preferred shares dividend $ 3,820 $ 3,858