Schedule of Financial Information by Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 663,643	$ 586,372	$ 617,949
Cost of revenue	297,827	269,887	284,967
Operating expenses	223,569	193,478	209,071
Depreciation and amortization	7,914	8,946	7,987
Total costs and expenses	529,310	472,311	502,025
Operating income	134,333	114,061	115,924
Americas
Segment Reporting Information [Line Items]
Total revenue	526,215	465,939	489,834
Cost of revenue	225,799	202,421	218,850
Operating expenses	202,217	174,477	185,399
Depreciation and amortization	7,020	7,932	6,961
Total costs and expenses	435,036	384,830	411,210
Operating income	91,179	81,109	78,624
EMEA
Segment Reporting Information [Line Items]
Total revenue	110,574	93,582	98,273
Cost of revenue	58,593	53,661	51,938
Operating expenses	16,496	14,461	18,635
Depreciation and amortization	738	823	766
Total costs and expenses	75,827	68,945	71,339
Operating income	34,747	24,637	26,934
APAC
Segment Reporting Information [Line Items]
Total revenue	26,854	26,851	29,842
Cost of revenue	13,435	13,805	14,179
Operating expenses	4,856	4,540	5,037
Depreciation and amortization	156	191	260
Total costs and expenses	18,447	18,536	19,476
Operating income	8,407	8,315	10,366
Cloud Subscriptions
Segment Reporting Information [Line Items]
Total revenue	122,195	79,830	46,831
Cloud Subscriptions | Americas
Segment Reporting Information [Line Items]
Total revenue	103,863	69,469	40,927
Cloud Subscriptions | EMEA
Segment Reporting Information [Line Items]
Total revenue	15,380	8,465	4,762
Cloud Subscriptions | APAC
Segment Reporting Information [Line Items]
Total revenue	2,952	1,896	1,142
Software License
Segment Reporting Information [Line Items]
Total revenue	37,070	38,284	48,855
Cost of revenue	2,309	2,894	2,626
Software License | Americas
Segment Reporting Information [Line Items]
Total revenue	29,300	30,509	34,544
Software License | EMEA
Segment Reporting Information [Line Items]
Total revenue	5,729	4,308	11,518
Software License | APAC
Segment Reporting Information [Line Items]
Total revenue	2,041	3,467	2,793
Maintenance
Segment Reporting Information [Line Items]
Total revenue	145,841	147,748	149,230
Maintenance | Americas
Segment Reporting Information [Line Items]
Total revenue	113,169	116,309	118,891
Maintenance | EMEA
Segment Reporting Information [Line Items]
Total revenue	23,091	22,208	21,322
Maintenance | APAC
Segment Reporting Information [Line Items]
Total revenue	9,581	9,231	9,017
Services
Segment Reporting Information [Line Items]
Total revenue	334,799	303,569	360,516
Services | Americas
Segment Reporting Information [Line Items]
Total revenue	256,392	232,954	283,008
Services | EMEA
Segment Reporting Information [Line Items]
Total revenue	66,131	58,360	60,618
Services | APAC
Segment Reporting Information [Line Items]
Total revenue	12,276	12,255	16,890
Hardware
Segment Reporting Information [Line Items]
Total revenue	23,738	16,941	12,517
Hardware | Americas
Segment Reporting Information [Line Items]
Total revenue	23,491	16,698	12,464
Hardware | EMEA
Segment Reporting Information [Line Items]
Total revenue	243	241	$ 53
Hardware | APAC
Segment Reporting Information [Line Items]
Total revenue	$ 4	$ 2