UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Total revenue	$ 225,951	$ 216,703	$ 718,917	$ 634,841
Cost of revenue
Total cost of revenue	77,799	80,898	234,018	232,415
Gross profit	148,152	135,805	484,899	402,426
Operating expenses
Selling and marketing	132,053	115,237	395,684	341,064
Research and development	60,024	52,492	177,620	152,802
General and administrative	17,907	14,843	49,192	41,693
Total operating expenses	209,984	182,572	622,496	535,559
(Loss) from operations	(61,832)	(46,767)	(137,597)	(133,133)
Foreign currency transaction gain (loss)	4,236	(1,970)	2,545	(3,577)
Interest income	243	598	1,092	1,865
Interest expense	(5,956)	(42)	(13,791)	(42)
Gain on capped call transactions	18,989	0	19,816	0
Other income, net	0	323	1,374	378
(Loss) before (benefit from) income taxes	(44,320)	(47,858)	(126,561)	(134,509)
(Benefit from) income taxes	(25,053)	(17,520)	(61,182)	(43,158)
Net (loss)	$ (19,267)	$ (30,338)	$ (65,379)	$ (91,351)
(Loss) per share
Basic (in dollars per share)	$ (0.24)	$ (0.38)	$ (0.82)	$ (1.16)
Diluted (in dollars per share)	$ (0.24)	$ (0.38)	$ (0.82)	$ (1.16)
Weighted-average number of common shares outstanding
Basic (in shares)	80,537	79,200	80,191	78,928
Diluted (in shares)	80,537	79,200	80,191	78,928
Software license
Revenue
Total revenue	$ 39,784	$ 58,005	$ 187,023	$ 165,543
Cost of revenue
Total cost of revenue	691	676	2,354	2,982
Maintenance
Revenue
Total revenue	74,670	70,371	220,587	207,406
Cost of revenue
Total cost of revenue	5,478	6,688	16,645	19,315
Pega Cloud
Revenue
Total revenue	54,776	35,153	147,080	94,610
Cost of revenue
Total cost of revenue	19,717	17,824	56,238	47,769
Consulting
Revenue
Total revenue	56,721	53,174	164,227	167,282
Cost of revenue
Total cost of revenue	$ 51,913	$ 55,710	$ 158,781	$ 162,349