Note 8. Restricted Cash and Investments (Tables)

12 Months Ended

Dec. 31, 2015

Restricted Cash and Investments [Abstract]

Restricted Cash And Investments

Restricted cash and investments consisted of the following at December 31, 2015 and 2014 (in thousands):

	2015		2014
Restricted cash	$	7,764	$	49,818
Restricted investments	326,114		357,235
Total restricted cash and investments (1)	$	333,878	$	407,053

(1) There was an additional $72.5 million and $74.7 million of restricted cash included within prepaid expenses and other current assets at December 31, 2015 and 2014, respectively.

Restricted Available For Sale Securities

The following tables summarize the unrealized gains and losses related to our restricted investments, by major security type, as of December 31, 2015 and 2014 (in thousands):

	As of December 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Foreign government obligations	$	177,507	$	75,670	$	—	$	253,177
U.S. government obligations	61,228		11,709		—		72,937
Total	$	238,735	$	87,379	$	—	$	326,114

	As of December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Foreign government obligations	$	189,455	$	93,280	$	—	$	282,735
U.S. government obligations	58,510		15,990		—		74,500
Total	$	247,965	$	109,270	$	—	$	357,235