Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income (loss)	$ (493,927)	$ (857,873)	$ 583,201
Other comprehensive income (loss)
Foreign currency translation adjustments	990	(19)	(5,278)
Net pension plan gain (loss) (net of tax provision (benefit) of $523, ($1,828) and $4,021 for the year ended December 31, 2017, 2016 and 2015, respectively)	6,774	(8,237)	7,099
Amortization of deferred pension plan amounts (net of tax provision of $623, $1,635 and $2,297 for the year ended December 31, 2017, 2016 and 2015, respectively)	1,393	3,127	4,422
Net pension plan curtailment and settlement expense (net of tax provision of zero, $7,218 and zero for the year ended December 31, 2017, 2016 and 2015, respectively)	95	15,216	0
Prior service cost arising during the period (net of tax provision of zero, $344 and zero for the year ended December 31, 2017, 2016 and 2015, respectively)	0	948	0
Other comprehensive income, net	9,252	11,035	6,243
Net comprehensive (income) attributable to noncontrolling interests	(22,584)	(71,707)	(72,201)
Comprehensive income (loss) attributable to the company	(507,259)	(918,545)	517,243
Noble Corp
Net income (loss)	(451,732)	(828,007)	607,012
Other comprehensive income (loss)
Foreign currency translation adjustments	990	(19)	(5,278)
Net pension plan gain (loss) (net of tax provision (benefit) of $523, ($1,828) and $4,021 for the year ended December 31, 2017, 2016 and 2015, respectively)	6,774	(8,237)	7,099
Amortization of deferred pension plan amounts (net of tax provision of $623, $1,635 and $2,297 for the year ended December 31, 2017, 2016 and 2015, respectively)	1,393	3,127	4,422
Net pension plan curtailment and settlement expense (net of tax provision of zero, $7,218 and zero for the year ended December 31, 2017, 2016 and 2015, respectively)	95	15,216	0
Prior service cost arising during the period (net of tax provision of zero, $344 and zero for the year ended December 31, 2017, 2016 and 2015, respectively)	0	948	0
Other comprehensive income, net	9,252	11,035	6,243
Net comprehensive (income) attributable to noncontrolling interests	(22,584)	(71,707)	(72,201)
Comprehensive income (loss) attributable to the company	$ (465,064)	$ (888,679)	$ 541,054