Accumulated Other Comprehensive Loss

The following tables provide a reconciliation of the components of accumulated other comprehensive loss, net of tax, attributable to The Medicines Company for the three and six months ended June 30, 2018 and 2017:



	Three Months Ended June 30,
	2018								2017
	Foreign currency translation adjustment			Unrealized loss on available for sale securities		Total			Foreign currency translation adjustment			Unrealized loss on available for sale securities			Total
	(in thousands)
Balance at beginning of period	$	(4,471	)	$	—	$	(4,471	)	$	(5,807	)	$	—		$	(5,807	)
Other comprehensive (loss) income	(123		)	—		(123		)	368			(7		)	361
Total other comprehensive (loss) income	(123		)	—		(123		)	368			(7		)	361
Balance at end of period	$	(4,594	)	$	—	$	(4,594	)	$	(5,439	)	$	(7	)	$	(5,446	)



	Six Months Ended June 30,
	2018								2017
	Foreign currency translation adjustment			Unrealized loss on available for sale securities		Total			Foreign currency translation adjustment			Unrealized loss on available for sale securities			Total
	(in thousands)
Balance at beginning of period	$	(5,183	)	$	—	$	(5,183	)	$	(5,479	)	$	—		$	(5,479	)
Other comprehensive (loss) income before reclassifications	(594		)	—		(594		)	40			(7		)	33
Amounts reclassified from accumulated other comprehensive income⁽¹⁾	1,183			—		1,183			—			—			—
Total other comprehensive income (loss)	589			—		589			40			(7		)	33
Balance at end of period	$	(4,594	)	$	—	$	(4,594	)	$	(5,439	)	$	(7	)	$	(5,446	)

(1) See Note 15, “Discontinued Operations,” for a discussion of this reclassification of foreign currency translation adjustment.