CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows provided by Operating Activities:
Net income	$ 66,374	$ 59,493
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,818	9,456
Adjustments to credit losses reserve	830	1,814
Stock-based compensation expense	6,196	5,425
Deferred income taxes	2,434
Amortization of discount on short-term investments	(4,402)
Loss on disposal of fixed assets	49	563
Changes in assets and liabilities:
Accounts receivable	20,928	20,869
Inventories	10,488	66,439
Prepaid expenses, income tax receivable, and other current assets	(3,405)	(9,556)
Other non-current assets	526	234
Accounts payable	29,141	31,648
Accrued expenses and other liabilities	9,643	(720)
Net cash provided by operating activities	148,620	185,665
Cash Flows used in Investing Activities:
Purchases of short-term investments	(255,075)	(48,699)
Maturities of short-term investments	150,607
Purchases of property and equipment	(5,215)	(7,355)
Net cash used in investing activities	(109,683)	(56,054)
Cash Flows used in Financing Activities:
Proceeds from short-term borrowings	25,204	70,877
Repayment of short-term borrowings	(25,204)	(70,877)
Purchase of common stock for treasury shares	(7,732)	(5,392)
Dividend payments	(7,900)	(6,307)
Issuance of stock under Employee Stock Purchase Plan	537	537
Payments of payroll taxes on stock-based compensation through shares withheld	(1,285)	(870)
Net cash used in financing activities	(16,380)	(12,032)
Increase in cash and cash equivalents	22,557	117,579
Cash and cash equivalents, beginning of year	144,954	122,930
Cash and cash equivalents, end of period	167,511	240,509
Non-cash Investing and Financing Activities:
Accrued purchases of property and equipment	425	408
Accrued excise tax on treasury purchases	45	54
Supplemental Cash Flow Information:
Income taxes paid	24,533	34,251
Interest paid	$ 5	$ 19