Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Significant Accounting Policies

Inventory, net

	December 31,
	2017		2016
	(In thousands)
Raw materials	$	124,635	$	84,431
Work-in-progress		19,113		1,204
Finished goods		22,559		17,960
	$	166,307	$	103,595

Change in the carrying amount of goodwill for various contract drilling segments and other operating segments

The change in the carrying amount of goodwill for our reporting units for the years ended December 31, 2017 and 2016 was as follows:

			Acquisitions
			and
	Balance at		Purchase		Disposals		Cumulative		Balance at
	December 31,		Price		and		Translation		December 31,
	2015		Adjustments		Impairments		Adjustment		2016
	(In thousands)
Drilling & Rig Technologies:
U.S.	$	50,149	$	—	$	—	$	—	$	50,149
International		75,634		—		—		—		75,634
Rig Technologies		40,876		—		—		258		41,134
Total	$	166,659	$	—	$	—	$	258	$	166,917

			Acquisitions
			and
	Balance at		Purchase			Disposals		Cumulative		Balance at
	December 31,		Price			and		Translation		December 31,
	2016		Adjustments			Impairments		Adjustment		2017
	(In thousands)
Drilling & Rig Technologies:
U.S.	$	50,149	$	—		$	—	$	—	$	50,149
International		75,634		—			—		—		75,634
Rig Technologies		41,134		5,690	(1)		—		619		47,443
Total	$	166,917	$	5,690		$	—	$	619	$	173,226

(1) Represents the goodwill recorded in connection with our acquisition of RDS. See Note 5—Acquisitions for additional discussion.