RESTRICTED INVESTMENTS AND BOND COLLATERAL (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure Restricted Investments and Bond Collateral [Abstract]

Components of restricted investments and bond collateral

The Company’s restricted investments and bond collateral consist of the following:

	June 30, 2014		December 31, 2013
	(In thousands)
Coal - U.S. Segment:
WML debt reserve account	$	—	$	13,067
Reclamation bond collateral:
Kemmerer Mine	25,077		24,966
Absaloka Mine	11,696		11,653
Rosebud Mine	3,145		3,145
Beulah Mine	1,270		1,270
Coal - Canada Segment:
PMRU	16,201		—
CVRI	31,867		—
Power Segment:
Letter of credit account	—		5,998
Corporate Segment:
Postretirement medical benefit bonds	8,550		8,467
Workers’ compensation bonds	6,705		6,667
Total restricted investments and bond collateral	104,511		75,233
Less current portion	—		(5,998		)
Total restricted investments and bond collateral, less current portion	$	104,511	$	69,235

Carrying value and estimated fair value of restricted investments and bond collateral

The Company’s carrying value and estimated fair value of its restricted investments and bond collateral at June 30, 2014 are as follows:

	Carrying Value		Fair Value
	(In thousands)
Cash and cash equivalents	$	67,340	$	67,340
Time deposits	2,451		2,451
Held-to-maturity securities	34,720		35,259
	$	104,511	$	105,050

Amortized cost, gross unrealized holding gains and losses and fair value of held-to-maturity securities

The amortized cost, gross unrealized holding gains and fair value of held-to-maturity securities at June 30, 2014 is as follows (in thousands):

Amortized cost	$	34,720
Gross unrealized holding gains	628
Gross unrealized holding losses	(89		)
Fair value	$	35,259

Restricted Investments and Bond Collateral

Schedule of Held-to-maturity Securities [Line Items]

Maturities of held-to-maturity securities

Maturities of held-to-maturity securities are as follows at June 30, 2014:

	Amortized Cost		Fair Value
	(In thousands)
Due within one year	$	1,212	$	1,230
Due in five years or less	19,360		19,704
Due after five years to ten years	8,897		9,070
Due in more than ten years	5,251		5,255
	$	34,720	$	35,259