Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2017

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

11. Supplemental Cash Flow Information

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

	Six Months Ended
	June 30,
	2017			2016
	(Dollars in Thousands)
Other current and noncurrent assets	$	(32,332	)	$	(9,691	)
Accrued salaries, benefits and payroll taxes		(7,892	)		(7,808	)
Accrued insurance and other taxes		(134	)		(256	)
Accrued income taxes		28,047			(8,495	)
Accrued pension, postretirement and postemployment benefits		11,521			11,757
Other current and noncurrent liabilities		30,740			(5,477	)
	$	29,950		$	(19,970	)

The change in other current and noncurrent assets and other current and noncurrent liabilities is primarily attributable to an accrual of insurance claims over the deductible limits.  Additionally, the change in other current and noncurrent liabilities is due to retirement expense in the current year and the write-off of coal contracts in the prior year.  The change in accrued income taxes is attributable to net operating loss carryforwards utilized in the prior year.

Noncash investing and financing activities are as follows:

	Six Months Ended
	June 30,
	2017		2016
	(Dollars in Thousands)
Noncash investing and financing activities:
Accrued liabilities for purchases of property, plant and equipment	$	34,714	$	33,959
Acquisition of assets through capital lease	$	149	$	—
Settlement of royalty obligation via asset sale	$	900	$	—

Supplemental disclosures of cash flow information are as follows:

	Six Months Ended
	June 30,
	2017		2016
	(Dollars in Thousands)
Cash paid for interest	$	38,111	$	36,630
Cash paid for income taxes	$	33,264	$	47,159