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Debt - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Operating Lease, Expense | $ 7,942,000 | $ 8,387,000 | $ 15,853,000 | $ 15,947,000 |  |  |  |
Finance Lease, Right-of-Use Asset, Amortization | 281,000 | 21,000 | 547,000 | 21,000 |  |  |  |
Finance Lease, Interest Expense | 51,000 | 5,000 | 100,000 | 5,000 |  |  |  |
Short-term Lease Payments | 6,185,000 | 5,640,000 | 12,611,000 | 11,245,000 |  |  |  |
Stockholders' Equity Attributable to Parent | 2,612,412,000 | 2,119,439,000 | 2,612,412,000 | 2,119,439,000 | $ 2,416,919,000 | $ 2,341,244,000 | $ 1,898,776,000 | $ 1,808,562,000
Net income | 164,075,000 | 210,209,000 | 339,778,000 | 398,615,000 |  |  |  |
Treasury Stock, Value, Acquired, Cost Method |  | (87,980,000) | (216,582,000) | (304,479,000) |  |  |  |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition |  | 18,577,000 | 21,926,000 | 37,910,000 |  |  |  |
APIC, Share-based Payment Arrangement, Recognition and Exercise | 16,984,000 | 79,857,000 | 126,046,000 | 178,831,000 |  |  |  |
Stock Issued During Period, Value, Stock Options Exercised | 0 | 0 | 0 | 0 |  |  |  |
Lease, Cost | 14,459,000 | 14,053,000 | 29,111,000 | 27,218,000 |  |  |  |
Operating cash flows from operating leases | 6,676,000 | 6,314,000 | 13,394,000 | 12,877,000 |  |  |  |
Operating cash flows from finance leases | 51,000 | 5,000 | 100,000 | 5,000 |  |  |  |
Financing cash flows from finance leases | 212,000 | 12,000 | 412,000 | 12,000 |  |  |  |
Operating leases | 1,901,000 | 3,571,000 | 5,685,000 | 9,551,000 |  |  |  |
Finance leases | 0 | 4,692,000 | 440,000 | 5,227,000 |  |  |  |
Deferred Compensation Activity Adjustments | 0 |  | 0 | 0 |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 206,000 | 206,000 | 206,000 | 206,000 | 206,000 | 206,000 | 206,000 | 206,000
Additional Paid-In-Capital [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 2,151,623,000 | 1,962,156,000 | 2,151,623,000 | 1,962,156,000 | 2,127,315,000 | 2,055,407,000 | 1,899,100,000 | 1,820,223,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition |  | 18,577,000 | 21,926,000 | 37,910,000 |  |  |  |
APIC, Share-based Payment Arrangement, Recognition and Exercise | 16,984,000 | 79,857,000 | 126,046,000 | 178,831,000 |  |  |  |
Stock Issued During Period, Value, Stock Options Exercised | (7,110,000) | (35,378,000) | (51,756,000) | (74,808,000) |  |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 8,249,650,000 | 7,429,948,000 | 8,249,650,000 | 7,429,948,000 | 8,085,575,000 | 7,909,872,000 | 7,219,739,000 | 7,031,333,000
Net income | 164,075,000 | 210,209,000 | 339,778,000 | 398,615,000 |  |  |  |
Treasury Stock [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | (7,789,067,000) | (7,272,871,000) | (7,789,067,000) | (7,272,871,000) | (7,796,177,000) | (7,624,241,000) | (7,220,269,000) | (7,043,200,000)
Treasury Stock, Value, Acquired, Cost Method |  | (87,980,000) | (216,582,000) | (304,479,000) |  |  |  |
Stock Issued During Period, Value, Stock Options Exercised | 7,110,000 | 35,378,000 | 51,756,000 | 74,808,000 |  |  |  |
Deferred Compensation Trust [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | (16,710,000) | (16,912,000) | (16,710,000) | (16,912,000) | (16,912,000) | (16,912,000) | (16,912,000) | (16,937,000)
Deferred Compensation Activity Adjustments | 202,000 |  | 202,000 | 25,000 |  |  |  |
Deferred Compensation Liability [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 16,710,000 | $ 16,912,000 | 16,710,000 | 16,912,000 | $ 16,912,000 | $ 16,912,000 | $ 16,912,000 | $ 16,937,000
Deferred Compensation Activity Adjustments | (202,000) |  | (202,000) | $ (25,000) |  |  |  |
Senior Notes due 2022 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Senior notes principal amount | $ 600,000,000 |  | $ 600,000,000 |  |  |  |  |
Senior notes interest rate | 3.95% |  | 3.95% |  |  |  |  |
Frequency of senior notes payment |  |  | semi-annually in arrears on March 15 and September 15 |  |  |  |  |
Senior notes effective interest rate | 3.97% |  | 3.97% |  |  |  |  |
Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum loan borrowing capacity | $ 200,000,000 |  | $ 200,000,000 |  |  |  |  |
Increase in commitment available |  |  | 300,000,000 |  |  |  |  |
Debt outstanding | 0 |  | 0 |  |  |  |  |
Credit Agreement [Member] | Revolving Credit Facility [Member] | Sublimit for Issuance of Letters of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum loan borrowing capacity | 100,000,000 |  | 100,000,000 |  |  |  |  |
Letters of credit outstanding | 11,200,000 |  | 11,200,000 |  |  |  |  |
Credit Agreement [Member] | Revolving Credit Facility [Member] | Sublimit for Swing Line Commitment [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum loan borrowing capacity | 25,000,000 |  | 25,000,000 |  |  |  |  |
Repurchase Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum loan borrowing capacity | 150,000,000 |  | 150,000,000 |  |  |  |  |
Debt outstanding | 0 |  | 0 |  |  |  |  |
Senior Notes Due Two Thousand Thirty [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Senior notes principal amount | $ 600,000,000 |  | $ 600,000,000 |  |  |  |  |
Senior notes interest rate | 3.00% |  | 3.00% |  |  |  |  |
Frequency of senior notes payment |  |  | semi-annually in arrears on May 15 and November 15 |  |  |  |  |
Senior notes effective interest rate | 3.02% |  | 3.02% |  |  |  |  |
Proceeds from Debt, Net of Issuance Costs |  |  | $ 595,300,000 |  |  |  |  |
Proceeds from Debt, Net of Issuance Costs |  |  | $ 595,300,000 |  |  |  |  |

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