DEBT (Tables)

6 Months Ended

Jun. 30, 2018

DEBT [Abstract]

Debt

	Effective	June 30	December 31	June 30
in thousands	Interest Rates	2018	2017	2017
Short-term Debt
Bank line of credit expires 20211	1.25%	$        360,000	$                0	$                0
Total short-term debt		$        360,000	$                0	$                0
Long-term Debt
Bank line of credit expires 20211		$                   0	$     250,000	$                0
Term loan due 20182		0	350,000	0
7.00% notes due 2018		0	0	272,512
10.375% notes due 2018		0	0	250,000
Floating-rate notes due 2020	3.00%	250,000	250,000	250,000
Floating-rate notes due 2021	2.93%	500,000	0	0
7.50% notes due 2021		0	35,111	600,000
8.85% notes due 2021	8.88%	6,000	6,000	6,000
Term loan due 20212		0	250,000	250,000
4.50% notes due 2025	4.65%	400,000	400,000	400,000
3.90% notes due 2027	4.00%	400,000	400,000	400,000
7.15% notes due 2037	8.05%	129,239	240,188	240,188
4.50% notes due 2047	4.59%	700,000	700,000	700,000
4.70% notes due 2048	5.42%	460,949	0	0
Other notes 2	6.46%	219	230	358
Total long-term debt - face value		$     2,846,407	$  2,881,529	$  3,369,058
Unamortized discounts and debt issuance costs		(69,478)	(26,664)	(33,989)
Total long-term debt - book value		$     2,776,929	$  2,854,865	$  3,335,069
Less current maturities		23	41,383	525,776
Total long-term debt - reported value		$     2,776,906	$  2,813,482	$  2,809,293
Estimated fair value of long-term debt		$     2,782,543	$  2,983,419	$  3,077,069

1	Borrowings on the bank line of credit are classified as short-term debt if we intend to repay within twelve months and as long-term debt otherwise.
2	This short-term loan was refinanced on a long-term basis in February 2018 as discussed below. Thus, it was classified as long-term debt as of December 31, 2017.

Standby Letters of Credit

in thousands
Standby Letters of Credit
Risk management insurance	$       38,111
Reclamation/restoration requirements	6,956
Total	$       45,067