Noncontrolling interest (Tables)

3 Months Ended

Mar. 31, 2014

Noncontrolling Interest [Abstract]

Noncontrolling interest

The following table presents a reconciliation of the beginning and ending balances of redeemable noncontrolling interest and noncontrolling interest for the three months ended March 31, 2014:

	Three Months Ended March 31, 2014
	Redeemable noncontrolling interest			Noncontrolling interest		Total
As at December 31, 2013	$	86,512		$	497,657	$	584,169
Income attributable to third parties	232			43,277		43,509
Adjustment to noncontrolling interest as a result of deconsolidation	(78,354		)	—		(78,354		)
As at March 31, 2014	$	8,390		$	540,934	$	549,324

The following table presents a reconciliation of the beginning and ending balances of redeemable noncontrolling interest and noncontrolling interest for the three months ended March 31, 2013:

	Three Months Ended March 31, 2013
	Redeemable noncontrolling interest		Noncontrolling interest			Total
As at December 31, 2012	$	—	$	434,280		$	434,280
Issuance of shares	55,690		—			55,690
Income (loss) attributable to third parties	587		(3,136		)	(2,549		)
As at March 31, 2013	$	56,277	$	431,144		$	487,421