CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 71,364,000	$ 60,523,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,968,000	13,053,000
Amortization of financing costs and discounts	1,387,000	1,526,000
Non-cash operating lease costs	1,158,000	1,304,000
Share-based compensation	11,610,000	13,557,000
Provision for doubtful accounts	3,220,000	4,409,000
Deferred income taxes, net	1,255,000	2,029,000
Gain on extinguishment of debt	(6,667,000)	0
Other	0	30,000
Decrease (increase) in:
Accounts receivable	(2,663,000)	(6,126,000)
Prepaid expenses and other current assets	759,000	7,144,000
Other assets	947,000	1,182,000
Increase (decrease) in:
Accounts payable and accrued expenses	11,265,000	10,210,000
Income taxes payable	2,544,000	4,615,000
Deferred revenue	(924,000)	(2,088,000)
Operating lease liabilities	(1,726,000)	(1,578,000)
Liability for uncertain tax positions	2,147,000	2,323,000
Other liabilities	(23,000)	(34,000)
Net cash provided by operating activities	110,621,000	112,079,000
Cash flows from investing activities:
Purchases of property and equipment	(25,460,000)	(28,725,000)
Purchase of investments	0	(4,000,000)
Net cash used in investing activities	(25,460,000)	(32,725,000)
Cash flows from financing activities:
Proceeds from the issuance of common stock under employee stock purchase plan	747,000	871,000
Repurchase of common stock	(708,000)	(13,716,000)
Taxes paid related to net share settlement	(686,000)	(1,245,000)
Repurchase of debt	(116,162,000)	0
Net cash used in financing activities	(116,809,000)	(14,090,000)
Effect of exchange rate changes on cash and cash equivalents	(2,469,000)	(3,746,000)
Net change in cash and cash equivalents	(34,117,000)	61,518,000
Cash and cash equivalents at beginning of period	88,715,000	94,164,000
Cash and cash equivalents at end of period	$ 54,598,000	$ 155,682,000