Cash, Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 31, 2016

Cash and Cash Equivalents [Abstract]

Schedule of Cash, Cash Equivalents and Investments

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