Stock-Based Compensation (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) director $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) shares
Unrecognized compensation cost and vesting period
Unrecognized compensation costs related to unvested stock-based compensation arrangements | $	$ 16,100,000
Weighted-average period for recognition of unrecognized stock-based compensation expense	2 years 1 month 6 days
Other disclosures
Shares issued and committed to issue | shares	16,700	13,400	12,600
Shares committed to be issued | shares	9,300	6,900	7,400
Shares expected to be settled In cash | shares	7,400	6,500	5,200
Stock-based compensation expense recognized in operating expenses | $	$ (12,503,000)	$ (15,036,000)	$ (11,384,000)
Requisite service period for options to vest	3 years
Tax benefit of stock-based compensation expense in provision for income taxes | $	$ 3,133,000	3,787,000	2,859,000
Share-based Payment Arrangement, Expense, after Tax | $	9,370,000	11,249,000	8,525,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $	$ 25,565,000	$ 15,701,000	21,921,000
Weighted average grant date, period	60 days
Vesting period	4 years
Restricted Stock Units
Restricted stock unit activity
Outstanding at the beginning of the period (in shares) | shares	344,000
Awarded (in shares) | shares	186,000
Vested (in shares) | shares	(219,000)
Forfeited (in shares) | shares	(9,000)
Outstanding at the end of the period (in shares) | shares	302,000	344,000
Outstanding and expected to vest at the end of the period (in shares) | shares	351,000
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 81.33
Awarded (in dollars per share) | $ / shares	119.60
Vested (in dollars per share) | $ / shares	65.45
Forfeited (in dollars per share) | $ / shares	99.29
Outstanding at the end of the period (in dollars per share) | $ / shares	102.10	$ 81.33
Outstanding and expected to vest at the end of the period (in dollars per share) | $ / shares	$ 97.86
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars) | $	$ 26,745,000	$ 47,721,000
Outstanding and expected to vest at end of the period (in dollars) | $	$ 31,107,000
Closing price per share (in dollars per share) | $ / shares	$ 88.66
Total intrinsic value of awards vested (in dollars) | $	$ 25,600,000	$ 15,700,000	21,900,000
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 81.33
Forfeited (in dollars per share) | $ / shares	99.29
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 102.10	$ 81.33
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars) | $	$ 26,745,000	$ 47,721,000
Other disclosures
Stock-based compensation expense recognized in operating expenses | $	$ (655,000)
Phantom Share Units (PSUs)
Other disclosures
Vesting period	3 years
2011 Plan | Non-Qualified Stock Options
Stock-Based Compensation
Maximum common stock shares that may be issued under plan | shares	16,300,000
Stock Bonus Plan | Restricted Stock Units
Aggregate Intrinsic Value
Total intrinsic value of awards vested (in dollars) | $	$ 1,500,000	$ 1,700,000	$ 1,200,000
Independent directors | Restricted Stock Units
Aggregate Intrinsic Value
Number Of Directors | director	7
Other disclosures
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense | $	$ 704,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | shares	6,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares	$ 105.50
Employees | Restricted Stock Units
Restricted stock unit activity
Awarded (in shares) | shares	180,000
Weighted-Average Exercise Price
Awarded (in dollars per share) | $ / shares	$ 120.09
Other disclosures
Vesting period	4 years