CONDENSED CONSOLIDATED STATEMENT OF EQUITY - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Noncontrolling interest in subsidiary
Beginning Balance at Dec. 31, 2017	$ 353,078	$ 6,089	$ 300,866	$ 220,104	$ (191,737)	$ 17,756
Change in accounting principle - ASU 2016-01 at Dec. 31, 2017				46,069	(46,069)
Balance at January 1, 2018, as adjusted at Dec. 31, 2017	353,078	6,089	300,866	266,173	(237,806)	17,756
Net income (loss)	(42,098)			(43,752)		1,654
Other comprehensive income, net of tax	299				299
Issuance of NL common stock	120	1	119
Dividends	(251)					(251)
Other, net	172		154			18
Ending Balance at Sep. 30, 2018	$ 311,320	$ 6,090	$ 301,139	$ 222,421	$ (237,507)	$ 19,177