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Shareholders' Equity (Details) |  |  |  |  |  |  |  |  |  |  | 12 Months Ended | 163 Months Ended | 206 Months Ended | 222 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 10, 2023 $ / shares | Aug. 16, 2023 USD ($) shares | May 18, 2023 $ / shares | Apr. 18, 2023 $ / shares | Mar. 01, 2023 $ / shares | Nov. 08, 2022 $ / shares | May 18, 2022 $ / shares | Dec. 10, 2021 USD ($) $ / shares shares | Nov. 09, 2021 $ / shares | May 17, 2021 $ / shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Nov. 03, 2022 USD ($) | Mar. 13, 2020 USD ($)
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized Repurchase |  |  |  |  |  |  |  |  |  |  | $ 25,000,000 |  |  | $ 25,000,000 | $ 25,000,000 | $ 25,000,000 | $ 50,000,000 | $ 20,000,000
Stock repurchased during period (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 424,777 | 364,914 | 480,447 |  |  | 22,445,813 |  |
Aggregate price of shares repurchased since inception |  |  |  |  |  |  |  |  |  |  | $ 26,311,000 | $ 13,755,000 | $ 22,466,000 |  |  | $ 303,076,000 |  |
Average price of shares repurchased since inception (per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 61.94 | $ 37.69 | $ 46.76 |  |  | $ 13.50 |  |
Dividends declared (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.32 | $ 0.29 | $ 0.25 |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  |  |  | $ 26,400,000 | $ 22,900,000 | $ 19,900,000 |  |  |  |  |
Contingent consideration (Note 4) |  |  |  |  |  |  |  |  |  |  |  |  | $ 66,000,000 |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ / shares | $ 0.32 |  | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.26 |  | $ 0.26 | $ 0.26 |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Number Of Additional Shares Issued During Split | shares |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Number Of Shares Held By Shareholder Before Split | shares |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments For Stock Split |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings |  | 100,000 |  |  |  |  |  |  |  |  | 612,835,000 | 461,657,000 |  | 612,835,000 | 612,835,000 | $ 612,835,000 |  |
Common stock, $.004 par value, 100,000,000 shares authorized, 81,508,381 and 80,137,776 issued and outstanding at December 31, 2023 and 2022, respectively2 |  | $ 100,000 |  |  |  |  |  |  |  |  | 326,000 | $ 322,000 |  | 326,000 | 326,000 | 326,000 |  |
Stock split, conversion ratio |  | 1.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BasX, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration (Note 4) |  |  |  |  |  |  |  | $ 78,000,000 |  |  |  |  |  |  |  |  |  |
Contingent consideration paid in business combination (in shares) | shares |  |  |  |  |  |  |  | 1,560,000 |  |  |  |  |  |  |  |  |  |
Equity interests issuable (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 0.004 |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  |  |  |  |  |  |  | $ (60,000,000) |  |  | $ (60,000,000) | $ (60,000,000) | $ (60,000,000) |  |
Stock issued during period, shares, issued for services (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 580,000 | 730,000 |  |  |  |  |
Regular Semi-Annual Dividend |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared (in dollars per share) | $ / shares | $ 0.08 |  | $ 0.08 | $ 0.08 | $ 0.08 | $ 0.16 | $ 0.13 |  | $ 0.13 | $ 0.13 |  |  |  |  |  |  |  |
Open market |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchased during period (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 402,873 | 183,168 | 0 | 6,893,924 |  |  |  |
Aggregate price of shares repurchased since inception |  |  |  |  |  |  |  |  |  |  | $ 25,009,000 | $ 6,823,000 | $ 0 | $ 106,625,000 |  |  |  |
Average price of shares repurchased since inception (per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 62.08 | $ 37.25 | $ 0 | $ 15.47 |  |  |  |
401(k) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchased during period (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 0 | 155,904 | 446,658 |  |  | 12,462,552 |  |
Aggregate price of shares repurchased since inception |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 5,913,000 | $ 20,876,000 |  |  | $ 171,789,000 |  |
Average price of shares repurchased since inception (per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 37.93 | $ 46.74 |  |  | $ 13.78 |  |
Employees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchased during period (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 21,904 | 25,842 | 33,789 |  | 3,089,337 |  |  |
Aggregate price of shares repurchased since inception |  |  |  |  |  |  |  |  |  |  | $ 1,302,000 | $ 1,019,000 | $ 1,590,000 |  | $ 24,662,000 |  |  |
Average price of shares repurchased since inception (per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 59.44 | $ 39.43 | $ 47.06 |  | $ 7.98 |  |  |

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