Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Components of Change in Other Assets and Liabilities, Net

The components of the change in other assets and liabilities, net, are as follows:

years ended December 31

(add 000)	2015			2014			2013
Other current and noncurrent assets	$	(3,631	)	$	8,066		$	1,186
Accrued salaries, benefits and payroll taxes		(12,303	)		10,136			(4,276	)
Accrued insurance and other taxes		4,425			(17,641	)		421
Accrued income taxes		(4,364	)		27,680			3,889
Accrued pension, postretirement and postemployment    benefits		(18,153	)		1,150			(4,795	)
Other current and noncurrent liabilities		(3,014	)		(10,681	)		7,373
Change in other assets and liabilities	$	(37,040	)	$	18,710		$	3,798

Schedule Of Noncash Investing and Financing Activities

Noncash investing and financing activities are as follows:

years ended December 31

(add 000)	2015		2014		2013
Noncash investing and financing activities:
Acquisition of assets through asset exchange	$	5,000	$	2,091	$	—
Acquisition of assets through capital lease	$	1,445	$	7,788	$	10,341
Seller financing of land purchase	$	—	$	1,500	$	—
Acquisition of TXI net assets assumed through issuances of common stock and options	$	—	$	2,691,986	$	—