Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Significant Accounting Policies

Inventory, net

	December 31,
	2018		2017
	(In thousands)
Raw materials	$	116,840	$	124,635
Work-in-progress		20,329		19,113
Finished goods		28,418		22,559
	$	165,587	$	166,307

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 segments for the years ended December 31, 2018 and 2017 was as follows:

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

			Acquisitions
			and
	Balance at		Purchase			Disposals		Cumulative		Balance at
	December 31,		Price			and		Translation		December 31,
	2017		Adjustments			Impairments		Adjustment		2018
	(In thousands)
U.S. Drilling	$	50,149	$	—		$	—	$	—	$	50,149
International Drilling		75,634		—			—		—		75,634
Drilling Solutions		—		11,436	(2)		—		—		11,436
Rig Technologies		47,443		—			—		(748)		46,695
Total	$	173,226	$	11,436		$	—	$	(748)	$	183,914

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

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