UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue
Total revenue	$ 227,375	$ 205,592	$ 492,966	$ 418,138
Cost of revenue
Total cost of revenue	76,691	77,080	156,219	151,517
Gross profit	150,684	128,512	336,747	266,621
Operating expenses
Selling and marketing	127,607	116,962	263,631	225,827
Research and development	58,869	49,714	117,596	100,310
General and administrative	15,655	14,174	31,285	26,850
Total operating expenses	202,131	180,850	412,512	352,987
(Loss) from operations	(51,447)	(52,338)	(75,765)	(86,366)
Foreign currency transaction gain (loss)	4,256	2,105	(1,691)	(1,607)
Interest income	242	544	849	1,267
Interest expense	(5,529)	0	(7,835)	0
Gain on capped call transactions	19,419	0	827	0
Other income, net	0	55	1,374	55
(Loss) before (benefit from) income taxes	(33,059)	(49,634)	(82,241)	(86,651)
(Benefit from) income taxes	(12,319)	(17,338)	(36,129)	(25,638)
Net (loss)	$ (20,740)	$ (32,296)	$ (46,112)	$ (61,013)
(Loss) per share
Basic (in dollars per share)	$ (0.26)	$ (0.41)	$ (0.58)	$ (0.77)
Diluted (in dollars per share)	$ (0.26)	$ (0.41)	$ (0.58)	$ (0.77)
Weighted-average number of common shares outstanding
Basic (in shares)	80,224	78,987	80,016	78,787
Diluted (in shares)	80,224	78,987	80,016	78,787
Software license
Revenue
Total revenue	$ 53,323	$ 44,274	$ 147,239	$ 107,538
Cost of revenue
Total cost of revenue	979	928	1,663	2,306
Maintenance
Revenue
Total revenue	72,222	69,329	145,917	137,035
Cost of revenue
Total cost of revenue	5,591	6,292	11,167	12,627
Pega Cloud
Revenue
Total revenue	48,838	31,699	92,304	59,457
Cost of revenue
Total cost of revenue	18,988	16,647	36,521	29,945
Consulting
Revenue
Total revenue	52,992	60,290	107,506	114,108
Cost of revenue
Total cost of revenue	$ 51,133	$ 53,213	$ 106,868	$ 106,639