Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 68,117	$ 60,158
Accounts receivable	1,803	1,339
Prepaid expenses	5,737	4,475
Inventory	520	675
Income tax receivable	3,547	692
Current assets before funds held for clients	79,724	67,339
Funds held for clients	787,015	858,244
Total current assets	866,739	925,583
Property and equipment, net	116,957	96,848
Deposits and other assets	1,326	1,215
Goodwill	51,889	51,889
Intangible assets, net	1,065	1,871
Deferred income tax assets, net	7,967	1,207
Total assets	1,045,943	1,078,613
Current liabilities:
Accounts payable	3,439	3,737
Accrued commissions and bonuses	5,236	8,003
Accrued payroll and vacation	5,857	4,769
Deferred revenue	6,040	5,230
Current portion of long-term debt	1,139	1,113
Accrued expenses and other current liabilities	19,726	17,798
Current liabilities before client funds obligation	41,437	40,650
Client funds obligation	787,015	858,244
Total current liabilities	828,452	898,894
Long-term deferred revenue	38,964	34,481
Net long-term debt, less current portion	33,479	28,711
Total long-term liabilities	72,443	63,192
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value (100,000,000 shares authorized, 59,520,637 and 58,453,283 shares issued at June 30, 2017 and December 31, 2016, respectively; 57,938,217 and 57,331,022 shares outstanding at June 30, 2017 and December 31, 2016, respectively)	595	585
Additional paid-in capital	114,287	95,452
Retained earnings	110,283	70,448
Treasury stock, at cost (1,582,420 and 1,122,261 shares at June 30, 2017 and December 31, 2016, respectively)	(80,117)	(49,958)
Total stockholders' equity	145,048	116,527
Total liabilities and stockholders' equity	$ 1,045,943	$ 1,078,613