Business Combinations, Discontinued Operations and Related Transactions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended					12 Months Ended							12 Months Ended				12 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Basic Management, Inc.	Dec. 31, 2013 Landwell	Dec. 31, 2013 Basic Management Inc And Landwell	Dec. 31, 2013 Basic Management Inc And Landwell Promissory Note	Dec. 31, 2013 Basic Management Inc And Landwell Face value Deferred payment	Dec. 31, 2013 Basic Management Inc And Landwell Present Value Deferred payment	Dec. 31, 2013 Certain Real Property Litigation Settlement	Dec. 31, 2013 General Partner Basic Management Inc And Landwell	Dec. 31, 2013 Aggregate General and Limited Interests Landwell	Dec. 31, 2013 Kronos Worldwide, Inc.	Dec. 31, 2011 Kronos Worldwide, Inc.	Dec. 31, 2010 Kronos Worldwide, Inc.	Dec. 31, 2013 CompX	Dec. 31, 2013 CompX Taiwan Land	Dec. 31, 2012 CompX Taiwan Land	Dec. 31, 2012 CompX Discontinued operations	Dec. 31, 2013 CompX Class A	Nov. 30, 2013 Entity One Basic Management, Inc.	Nov. 30, 2013 Entity One Landwell	Nov. 30, 2013 Nevada Environmental Response Trust Basic Management, Inc.	Nov. 30, 2010 Nevada Environmental Response Trust Basic Management, Inc.	Nov. 30, 2013 Nevada Environmental Response Trust Landwell	Nov. 30, 2010 Nevada Environmental Response Trust Landwell	Nov. 30, 2013 Entity Three Basic Management, Inc.	Nov. 30, 2013 Entity Three Landwell
Business Combinations Discontinued Operations And Related Transactions [Line Items]
Repurchase of common stock																							2,000,000
Repurchased shares																					49,000	1,400,000
Repurchased shares, value																					$ 0.7
Shares available for purchase																					1,950,000							678,000
Sale of Furniture Components segment									0	58.0	0.3																58.0
Gain on sale of discontinued operations										23.7																	23.7
Gain on sale discontinued operations, net of tax																											15.7
Net income (loss) per share	$ 0.05	$ (0.10)	$ (0.12)	$ (0.12)	$ 0.01	$ 0.07	$ 0.13	$ 0.26	$ (0.29)	$ 0.47	$ 0.64																$ 0.05
Reclassification out of AOCI, foreign currency translation adjustment																											10.4
Statutory income tax rate of foreign tax credit									35.00%	35.00%	35.00%
Promissory note receivable																										3.0
Cash collected on notes receivable																									3.0
Equity ownership percentage												32.00%	12.00%
Noncontrolling interest, ownership percentage																													32.00%	21.00%	31.00%	31.00%	15.00%	15.00%	5.00%	2.00%
Controlling interest in subsidiary												63.00%	27.00%						50.00%	77.00%	80.00%			87.00%
Business acquisition, percentage of voting interests acquired												31.00%	15.00%
Total fair value of consideration														32.6
Fair value of consideration, cash														5.3
Business combination consideration transferred, liabilities incurred															19.1	11.1	8.2
Interest on promissory note and deferred payment															3.00%	3.00%
Discount rate																	3.00%
Recognized pre-tax gain on business combination														26.6
Business acquisition estimated fair value														43.4
Business acquisition at carrying value														16.8
Bargain purchase gain recognized														28.0
Option to acquire four parcels of real property														$ 8.5				$ 14.9