CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities
Net income	$ 40,412	$ 42,133
Adjustments to reconcile net income to cash provided by operating activities
Depreciation and amortization	3,481	3,288
Share-based compensation	2,117	2,245
Loss on sale of disposal of property, plant and equipment		17
Amortization of premium on investment securities	182	249
Deferred income taxes	(764)	375
Change in operating assets and liabilities:
Accounts receivable	601	33
Inventories	10,191	(9,585)
Income taxes, prepaid	5,169	(1,365)
Prepaid expenses and other current assets	(341)	(3,052)
Other assets	(2,446)	43
Accounts payable and accrued expenses	25,651	12,831
Net cash flow provided by operating activities	84,253	47,212
Investing Activities
Sale and maturities of investment securities	1,000	2,430
Purchase of property and equipment	(583)	(6,972)
Net cash flow provided by (used in) investing activities	417	(4,542)
Financing Activities
Options exercised by executives and directors	1,250	279
Net shares repurchased for employee taxes	(496)	(256)
Cash dividends paid to stockholders	(26,568)	(17,749)
Stock repurchases	(5,000)	(9,998)
Net cash flow used in financing activities	(30,814)	(27,724)
Foreign currency impact	(2)	1
Increase in cash and cash equivalents	53,854	14,947
Cash and cash equivalents - beginning of the period	76,974	81,364
Cash and cash equivalents - end of the period	130,828	96,311
Supplemental disclosure of cash flow information:
Income taxes paid (received)	120	11,338
Dividends declared included in accounts payable	$ 13,604	$ 9,102