CASH, CASH EQUIVALENTS AND INVESTMENTS

Under the terms of the agreements with certain of our workers' compensation and health benefit insurance carriers, we are required to maintain collateral in trust accounts for the benefit of specified insurance carriers and to reimburse the carriers’ claim payments within our deductible layer. We invest a portion of the collateral amounts in marketable securities. We report the current portion of these trust accounts as restricted cash and cash equivalents in WSE related assets, and long term portion as restricted cash, cash equivalents and investments on the consolidated balance sheets.

We require our clients to prefund their payroll and related taxes and other withholding liabilities before payroll is processed or due for payment. This prefund is included in WSE related assets as payroll funds collected which is designated to pay pending payrolls and other WSE related liabilities.

Our total corporate and WSE related cash, cash equivalents and investments are summarized below:



	December 31, 2016								December 31, 2015
(In thousands)	Cash and cash equivalents		Available for sale marketable securities		Certificate of deposits		Total		Cash and cash equivalents		Available for sale marketable securities		Certificate of deposits		Total
Cash and cash equivalents	$	184,004	$	—	$	—	$	184,004	$	166,178	$	—	$	—	$	166,178
Restricted cash and cash equivalents	14,569						14,569		14,557						14,557
Restricted cash, cash equivalents and investments, noncurrent
Collateral for workers' compensation claims	78,672		51,829		—		130,501		38,711		63,095		—		101,806
Worksite employee related assets
Restricted cash, cash equivalents and investments, current
Collateral for health benefits claims	65,022		—		—		65,022		46,980		—		—		46,980
Collateral for workers' compensation claims	64,773						64,773		45,937		1,500				47,437
Investments	—		—		2,320		2,320		—		—		2,319		2,319
Total WSE related restricted cash, cash equivalents and investments, current	129,795		—		2,320		132,115		92,917		1,500		2,319		96,736
Payroll funds collected	825,958		—		—		825,958		859,322		—		—		859,322
Total	$	1,232,998	$	51,829	$	2,320	$	1,287,147	$	1,171,685	$	64,595	$	2,319	$	1,238,599