Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 18,588	$ 5,995
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,909	2,133
Amortization of debt issuance costs	32	13
Stock-based compensation expense	1,223	254
Deferred income taxes, net	(3,644)	(101)
Changes in operating assets and liabilities:
Accounts receivable	(226)	1,110
Prepaid expenses	(1,262)	(1,092)
Inventory	423	(523)
Deposits and other assets	420	(119)
Accounts payable	(1,170)	(515)
Income taxes, net	13,325	4,288
Accrued commissions and bonuses	(6,903)	(3,512)
Accrued payroll and vacation	2,339	1,578
Deferred revenue	1,783	1,439
Accrued expenses and other current liabilities	2,111	2,188
Net cash provided by operating activities	29,948	13,136
Cash flows from investing activities
(Increase) decrease in funds held for clients	(428,916)	68,994
Decrease in restricted cash		371
Purchases of property and equipment	(8,363)	(2,502)
Net cash provided by (used in) investing activities	(437,279)	66,863
Cash flows from financing activities
Principal payments on long-term debt	(224)	(464)
Increase (decrease) in client funds obligation	428,916	(68,994)
Payment of debt issuance costs		(12)
Net cash provided by (used in) financing activities	428,692	(69,470)
Net increase in cash and cash equivalents	21,361	10,529
Cash and cash equivalents
Beginning of period	50,714	25,144
End of period	$ 72,075	$ 35,673