Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 64,455	$ 53,823	$ 38,598
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	47,493	38,765	30,354
Depreciation and amortization expense	37,913	34,564	30,202
Deferred income tax expense (benefit)	2,754	4,134	(21,870)
Provision for doubtful accounts	309	283	296
Net accretion of discounts and amortization of premiums on available-for-sale securities	(1,836)	(2,230)	(443)
Net realized losses on sales of available-for-sale securities			2
Amortization of debt issuance costs	154
Loss on disposal of equipment	395	454	227
Changes in operating assets and liabilities:
Accounts receivable	(732)	(1,188)	(1,494)
Deferred contract costs	(54,944)	(34,992)
Prepaid expenses and other	(196)	389	(2,141)
Accounts payable	(806)	(75)	740
Accrued expenses		13,625
Accrued expenses and other	17,696	13,625	11,641
Tenant improvement allowance		7,480	11,754
Net cash provided by operating activities	112,655	115,032	97,866
Cash flows from investing activities:
Purchases of available-for-sale securities and other	(400,343)	(250,685)	(196,597)
Proceeds from sales and maturities of available-for-sale securities	410,593	246,243	73,044
Capitalized internal-use software costs	(25,715)	(20,142)	(15,638)
Purchases of property and equipment	(16,578)	(11,280)	(21,676)
Lease allowances used for tenant improvements		(7,480)	(11,754)
Acquisition of business, net of cash acquired	(16,714)		(6,658)
Net cash used in investing activities	(48,757)	(43,344)	(179,279)
Cash flows from financing activities:
Net change in client fund obligations	(67,165)	168,855	281,467
Borrowings under credit facility	100,000
Payment of contingent consideration		(1,000)
Repurchases of common shares		(34,991)
Proceeds from exercise of stock options		85
Proceeds from employee stock purchase plan	8,901	5,982	4,304
Taxes paid related to net share settlement of equity awards	(38,943)	(24,207)	(10,554)
Payment of debt issuance costs	(701)
Net cash provided by financing activities	2,092	114,724	275,217
Net change in cash, cash equivalents and funds held for clients' cash and cash equivalents	65,990	186,412	193,804
Cash, cash equivalents and funds held for clients' cash and cash equivalents-beginning of year	1,426,143	1,239,731	1,045,927
Cash, cash equivalents and funds held for clients' cash and cash equivalents-end of year	1,492,133	1,426,143	1,239,731
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Build-out allowances received from landlords		1,264	1,956
Purchase of property and equipment and internal-use software, accrued but not paid	164	4,260	659
Liabilities assumed for acquisition	674
Supplemental Disclosure of Cash Flow Information
Cash paid for interest	438
Cash paid (refunds received) for income taxes	84	412	(53)
Reconciliation of cash, cash equivalents and funds held for clients' cash and cash equivalents to the Consolidated Balance Sheets
Cash and cash equivalents	250,851	132,476	137,193
Funds held for clients' cash and cash equivalents	1,241,282	1,293,667	1,102,538
Total cash, cash equivalents and funds held for clients' cash and cash equivalents	$ 1,492,133	$ 1,426,143	$ 1,239,731