UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 117,279	$ 103,486
Trade receivables, net of allowances of $2,509 and $3,204, respectively	266,919	228,373
Prepaid expenses and other current assets	7,492	7,033
Total current assets	391,690	338,892
Fixed assets, net	4,753	26,804
Other assets, net	87,132	77,575
Deferred tax assets, net	9,517	10,738
Goodwill	25,040	25,040
Total assets	518,132	479,049
Current liabilities:
Accounts payable and other accrued liabilities	47,670	35,533
Accrued payroll costs	82,486	65,849
Current portion of operating lease liabilities	6,642	5,520
Income taxes payable	3,179	964
Other current liabilities	124	300
Short-term debt - credit facility	100,000	0
Total current liabilities	240,101	108,166
Long-term debt – credit facility	0	100,000
Other long-term liabilities	91,752	90,948
Total liabilities	331,853	299,114
Commitments and contingencies (Note M)
Stockholders’ equity:
Preferred stock, $0.01 par; 15,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.01 par; 250,000 shares authorized, 72,655 and 72,600 issued, respectively	727	726
Additional paid-in capital	480,114	472,378
Accumulated other comprehensive loss	(371)	(4,423)
Retained earnings	413,018	388,645
Treasury stock, at cost; 50,961 and 50,427 shares, respectively	(707,209)	(677,391)
Total stockholders’ equity	186,279	179,935
Total liabilities and stockholders’ equity	$ 518,132	$ 479,049