RESTRICTED INVESTMENTS AND BOND COLLATERAL (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure Restricted Investments and Bond Collateral [Abstract]

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 at March 31, 2017 were as follows:

	Restricted Investments and Bond Collateral		Reclamation Deposits		Total Restricted Investments
	(In thousands)
Cash and cash equivalents	$	63,989	$	2,873	$	66,862
Time deposits	2,473		—		2,473
Available-for-sale	79,180		72,638		151,818
	$	145,642	$	75,511	$	221,153

The Company’s carrying value and estimated fair value of its restricted investments at December 31, 2016 were as follows:

	Restricted Investments and Bond Collateral		Reclamation Deposits		Total Restricted Investments
	(In thousands)
Cash and cash equivalents	$	66,860	$	2,673	$	69,533
Time deposits	2,473		—		2,473
Available-for-sale	75,580		71,689		147,269
	$	144,913	$	74,362	$	219,275

Amortized cost, gross unrealized holding gains and losses and fair value of available-for-sale securities

The cost basis, gross unrealized holding gains and losses, and fair value of available-for-sale securities at March 31, 2017 were as follows:

	Restricted Investments and Bond Collateral			Reclamation Deposits			Total Restricted Investments
	(In thousands)
Cost basis	$	79,767		$	72,915		$	152,682
Gross unrealized holding gains	394			622			1,016
Gross unrealized holding losses	(981		)	(899		)	(1,880		)
Fair value	$	79,180		$	72,638		$	151,818

The cost basis, gross unrealized holding gains and losses, and fair value of available-for-sale securities at December 31, 2016 were as follows:

	Restricted Investments and Bond Collateral			Reclamation Deposits			Total Restricted Investments
	(In thousands)
Cost basis	$	76,558		$	72,381		$	148,939
Gross unrealized holding gains	251			453			704
Gross unrealized holding losses	(1,229		)	(1,145		)	(2,374		)
Fair value	$	75,580		$	71,689		$	147,269