CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,126	$ 19,406
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	27,310	25,576
Stock-based compensation expense	5,850	6,096
Deferred income taxes	(597)	376
Other non-cash adjustments — net	2,478	159
Changes in assets and liabilities:
Accounts receivable	(13,271)	22,892
Prepaid expenses and other current assets	(8,136)	(13,238)
Accounts payable and accrued expenses	(20,266)	10,621
Income taxes	5,444	272
Deferred revenue	40,249	(25,060)
Leases	1,521	1,513
Other assets	2,836	6,987
Other current and long-term liabilities	15,769	2,958
Net cash provided by operating activities	67,313	58,558
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of fixed assets	(19,333)	(11,595)
Proceeds from the maturity of debt securities and sale of other investments	7,450	5,569
Purchases of debt securities and other investments	(6,225)	(3,180)
Payments and settlements for acquisitions — net of cash acquired	(121)	(147)
Net cash used in investing activities	(18,229)	(9,353)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	120,000	0
Payments under revolving credit facility	(159,500)	0
Principal payments of long-term debt	(4,000)	(4,000)
Proceeds from issuance of common stock upon exercise of options and restricted stock upon purchase	4,287	8,823
Taxes paid related to the net share settlement of stock options and restricted stock	(1,525)	(3,174)
Purchase of treasury stock	0	(39,913)
Payments of contingent consideration for acquisitions	(225)	(13,865)
Net cash used in financing activities	(40,963)	(52,129)
Effect of exchange rates on cash, cash equivalents and restricted cash	(114)	(605)
Net increase (decrease) in cash, cash equivalents and restricted cash	8,007	(3,529)
Cash, cash equivalents and restricted cash — beginning of period	51,894	265,281	$ 265,281
Cash, cash equivalents and restricted cash — end of period	59,901	261,752	51,894
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH TO THE CONSOLIDATED BALANCE SHEETS:
Cash and cash equivalents	44,629	257,227	36,224
Total cash, cash equivalents and restricted cash — end of period	59,901	261,752	$ 51,894
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash payments of interest	17,848	6,168
Cash payments of income taxes	4,903	4,072
Cash paid for amounts included in the measurement of lease liabilities	39,379	33,884
NON-CASH TRANSACTIONS:
Fixed asset purchases recorded in accounts payable and accrued expenses	2,167	1,074
Operating right-of-use assets obtained in exchange for operating lease liabilities — net	16,375	8,517
Restricted stock reclassified from other current liabilities to equity upon vesting	8,192	3,160
Prepaid and other current assets
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH TO THE CONSOLIDATED BALANCE SHEETS:
Restricted cash and cash equivalents	12,740	4,525
Other assets
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH TO THE CONSOLIDATED BALANCE SHEETS:
Restricted cash and cash equivalents	$ 2,532	$ 0