CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 216,054	$ 184,004
Restricted cash and cash equivalents	14,578	14,569
Prepaid income taxes	27,583	42,381
Prepaid expenses	9,051	10,784
Other current assets	2,005	2,145
Worksite employee related assets	1,039,349	1,281,471
Total current assets	1,308,620	1,535,354
Workers' compensation collateral receivable	34,755	31,883
Restricted cash and available for sale investments	127,715	130,501
Property and equipment, net	63,417	58,622
Goodwill	289,207	289,207
Other intangible assets, net	29,724	31,074
Other assets	19,234	18,502
Total assets	1,872,672	2,095,143
Current liabilities:
Accounts payable	22,598	22,541
Accrued corporate wages	40,908	30,937
Notes and capital leases payable, net	36,606	36,559
Other current liabilities	14,546	12,551
Worksite employee related liabilities	1,034,093	1,275,995
Total current liabilities	1,148,751	1,378,583
Notes and capital leases payable, net, noncurrent	413,328	422,495
Workers' compensation loss reserves (net of collateral paid $20,639 and $22,377 at March 31, 2017 and December 31, 2016, respectively)	164,671	159,301
Deferred income taxes	91,847	92,373
Other liabilities	11,528	7,801
Total liabilities	1,830,125	2,060,553
Commitments and contingencies
Stockholders’ equity:
Preferred stock ($0.000025 par value per share; 20,000,000 shares authorized; no shares issued and outstanding at March 31, 2017 and December 31, 2016)	0	0
Common stock and additional paid-in capital ($0.000025 par value per share; 750,000,000 shares authorized; 68,532,338 and 69,015,690 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively)	543,600	535,132
Accumulated deficit	(500,461)	(499,938)
Accumulated other comprehensive loss	(592)	(604)
Total stockholders’ equity	42,547	34,590
Total liabilities and stockholders’ equity	$ 1,872,672	$ 2,095,143