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Segment Information - Schedule of Operating Income and Operating Income Margin (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Schedule of Operating Income and Operating Income Margin [Member]
Operating revenues	$ 112,621	$ 107,034	$ 220,703	$ 203,872
Operating income	34,632	33,511	68,794	61,461
Add back: Expenses incurred in response to an activist campaign		4,271		4,966
Add back: Acquisition-related costs	1,967		1,967
Adjusted operating income	$ 36,599	$ 37,782	$ 70,761	$ 66,427
Operating income margin	30.80%	31.30%	31.20%	30.10%
Adjusted operating income margin	32.50%	35.30%	32.10%	32.60%

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- Definition

Amount of expense (income); loss (gain); increase (decrease) in liability and (increase) decrease in asset used in operating activity; and cash inflow (outflow) from operating activity, classified as other; in reconciling net income to reflect cash provided by (used in) operating activity when indirect cash flow method is applied.

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Amount of expense for acquisition-related cost incurred to effect business combination. Includes, but is not limited to, finder's fee; advisory, legal, accounting, valuation, and other professional and consulting fees; and general administrative cost, including cost of maintaining internal acquisition department.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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