Revenue Recognition - Summary of Impact of Adopting the New Revenue Standard on Condensed Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income (loss)	$ 5,969	$ 3,088	$ 5,051	$ (1,153)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization of acquisition-related intangible assets	5,253	5,702	10,579	10,890
Stock-based compensation plan expense			21,891	16,540
Depreciation and other amortization	5,551	$ 4,875	11,191	9,543
Gain on sale of cost-method investment			(237)
Deferred income tax benefit			(6,177)	(4,745)
Provision for allowances on accounts receivable			159	75
Amortization of debt issuance costs			208	711
Amortization of discount on investments			(75)	(5)
Loss (gain) on disposal of equipment			594	(10)
Loss (gain) on foreign exchange			326	(26)
Changes in operating assets and liabilities:
Accounts receivable			8,827	(12,326)
Prepaid expenses and other current assets			(1,982)	(1,089)
Other assets			(1,643)	926
Accounts payable			403	(145)
Accrued expenses			(4,858)	(1,932)
Customer account liabilities			2,761	(4,588)
Deferred revenue			(13,491)	(12,443)
Other liabilities			(278)	(697)
Net cash provided by operating activities			33,249	$ 5,100
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Operating activities:
Net income (loss)	(6,636)		(8,671)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock-based compensation plan expense			15
Deferred income tax benefit			5,738
Loss (gain) on foreign exchange			(5)
Changes in operating assets and liabilities:
Accounts receivable			328
Prepaid expenses and other current assets			2,754
Other assets			1,004
Deferred revenue			(1,163)
Accounting Standards Update 2014-09 [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Operating activities:
Net income (loss)	(667)		(3,620)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization of acquisition-related intangible assets	$ 5,253		10,579
Stock-based compensation plan expense			21,906
Depreciation and other amortization			11,191
Gain on sale of cost-method investment			(237)
Deferred income tax benefit			(439)
Provision for allowances on accounts receivable			159
Amortization of debt issuance costs			208
Amortization of discount on investments			(75)
Loss (gain) on disposal of equipment			594
Loss (gain) on foreign exchange			321
Changes in operating assets and liabilities:
Accounts receivable			9,155
Prepaid expenses and other current assets			772
Other assets			(639)
Accounts payable			403
Accrued expenses			(4,858)
Customer account liabilities			2,761
Deferred revenue			(14,654)
Other liabilities			(278)
Net cash provided by operating activities			$ 33,249