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[Line Items] for Schedule of Shareholders' Equity [Table]

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Number of shares of equity interests issued or issuable to acquire entity.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Amount of stock repurchase plan authorized.

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Shareholders' Equity (Details) - USD ($)								2 Months Ended	12 Months Ended			115 Months Ended	158 Months Ended	174 Months Ended
Shareholders' Equity (Details) - USD ($)	Dec. 10, 2021	Nov. 09, 2021	May 17, 2021	Nov. 10, 2020	May 15, 2020	Nov. 06, 2019	May 20, 2019	Feb. 23, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2019	Mar. 13, 2020	Mar. 05, 2019	May 16, 2018	May 19, 2015
Schedule of Shareholders' Equity [Line Items]
Authorized Repurchase															$ 20,000,000	$ 20,000,000	$ 15,000,000
Stock repurchased during period (in shares)									320,298	565,882	454,430			14,437,414
Aggregate price of shares repurchased since inception									$ 22,466,000	$ 31,229,000	$ 20,793,000			$ 263,010,000
Average price of shares repurchased since inception (per share)									$ 70.14	$ 55.19	$ 45.76			$ 18.22
Dividends declared (in dollars per share)									$ 0.38	$ 0.38	$ 0.32
Cash dividends paid									$ 19,900,000	$ 19,800,000	$ 16,600,000
Contingent consideration (Note 4)									$ 66,000,000
BasX, LLC
Schedule of Shareholders' Equity [Line Items]
Contingent consideration (Note 4)	$ 78,000,000
Contingent consideration paid in business combination (in shares)	1,037,000
Equity interests issuable (in dollars per share)	$ 0.004
Regular Semi-Annual Dividend
Schedule of Shareholders' Equity [Line Items]
Dividends declared (in dollars per share)		$ 0.19	$ 0.19	$ 0.19	$ 0.19	$ 0.16	$ 0.16
Open market
Schedule of Shareholders' Equity [Line Items]
Stock repurchase program amount authorized (in shares)																		5,700,000
Stock repurchased during period (in shares)									0	103,689	5,799	4,205,255
Aggregate price of shares repurchased since inception									$ 0	$ 4,987,000	$ 200,000	$ 74,793,000
Average price of shares repurchased since inception (per share)									$ 0	$ 48.10	$ 34.46	$ 17.79
Open market \| Subsequent Event
Schedule of Shareholders' Equity [Line Items]
Stock repurchased during period (in shares)								5,120
Aggregate price of shares repurchased since inception								$ 400,000
401(k)
Schedule of Shareholders' Equity [Line Items]
Stock repurchased during period (in shares)									297,772	438,921	419,963			8,204,432
Aggregate price of shares repurchased since inception									$ 20,876,000	$ 25,073,000	$ 19,386,000			$ 165,876,000
Average price of shares repurchased since inception (per share)									$ 70.11	$ 57.12	$ 46.16			$ 20.22
401(k) \| Subsequent Event
Schedule of Shareholders' Equity [Line Items]
Stock repurchased during period (in shares)								37,923
Aggregate price of shares repurchased since inception								$ 2,400,000
Directors & employees
Schedule of Shareholders' Equity [Line Items]
Stock repurchased during period (in shares)									22,526	23,272	28,668		2,027,727
Aggregate price of shares repurchased since inception									$ 1,590,000	$ 1,169,000	$ 1,207,000		$ 22,341,000
Average price of shares repurchased since inception (per share)									$ 70.59	$ 50.23	$ 42.11		$ 11.02