Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Measurement [Abstract]

Fair Value Assets Recurring and Nonrecurring

		March 31, 2016					December 31, 2015
	Category		Carrying amount		Fair value		Carrying amount		Fair value
Fair vales disclosed, recurring:
Cash and cash equivalents	Level 1	$	294,074	$	294,074	$	210,148	$	210,148
Restricted cash	Level 1		117,944		117,944		83,098		83,098
Short-term debt (note 19)	Level 2		42,504		42,504		12,350		12,350
Current portion of long-
term debt (note 19)	Level 2		46,132		46,132		43,348		43,348
Long-term debt (note 19)	Level 2		56,143		58,318		54,567		56,126