CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income	$ 164,031	$ 102,859	$ 77,916
Adjustments to reconcile net income to cash provided by operating activities
Depreciation and amortization	6,812	4,316	4,624
Non-cash lease expense	5,069	3,189	2,624
Share-based compensation	9,903	6,796	4,520
Loss on sale of disposal of property, plant and equipment	2	212	17
Amortization of premium on investment securities	89	320	454
Deferred income taxes	(3,715)	601	1,598
Change in operating assets and liabilities:
Inventories	(126,651)	(4,621)	(9,883)
Income taxes, prepaid	(945)	5,169	(5,169)
Prepaid expenses and other current assets	(9,887)	1,086	(1,936)
Other assets	(4,543)	(2,741)	(2,615)
Accounts payable and accrued expenses	54,380	28,010	12,111
Net cash flow provided by operating activities	94,545	145,196	84,261
Investing Activities
Sale and maturities of investment securities	5,145	4,605	3,730
Purchase of property and equipment	(34,209)	(5,887)	(10,058)
Net cash flow used in investing activities	(29,064)	(1,282)	(6,328)
Financing Activities
Options exercised by executives and directors	811	1,597	278
Net shares repurchased for taxes	(6,089)	(551)	(14,092)
Cash dividends paid to stockholders	(63,856)	(53,190)	(35,396)
Stock repurchases	(55,999)	(5,000)	(33,114)
Net cash flow used in financing activities	(125,133)	(57,144)	(82,324)
Foreign currency impact	112	(21)	1
(Decrease) Increase in cash and cash equivalents	(59,540)	86,749	(4,390)
Cash and cash equivalents - beginning of the period	163,723	76,974	81,364
Cash and cash equivalents - end of period	104,183	163,723	76,974
Supplemental disclosure of cash flow information
Income taxes paid	56,758	24,636	17,314
Dividends declared included in accounts payable	$ 17,186	$ 13,831	$ 13,719