Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Estimated Fair Value and Unrealized Gains (Losses) on Derivative Instruments

The following table sets forth the estimated fair value of derivative instruments recorded within other investments on the unaudited condensed consolidated balance sheet as at June 30, 2016 and the unrealized losses on derivative instruments recorded in net earnings for the three and six months ended June 30, 2016:

		Fair Value				Unrealized losses in net earnings
	Purchase Date	June 30, 2016		December 31, 2015		Three Months Ended June 30, 2016			Six Months Ended June 30, 2016
Call options on equities	March 1, 2016	$	4,850	$	—	$	(1,210	)	$	(650	)