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Share Repurchase Program and Treasury Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Stock Repurchase Program, Additional Authorized Amount |  |  |  |  | $ 2,000,000 |
Share Repurchase Program and Treasury Stock (Textuals) [Abstract] |  |  |  |  |  |
Remaining Amount to Repurchase under the program | $ 1,700,000 |  |  |  | $ 1,700,000 |
Shares Purchased Under Share Repurchase Program | 28,100,000 |  |  |  | 28,100,000 |
Treasury Stock, Value, Acquired, Cost Method | $ 186,250 | $ 186,250 | $ 118,749 | $ 118,750 | $ 372,500 | $ 237,500
Number of shares repurchased |  |  |  |  | (539,326) | (396,218)
Average price of share repurchased, per share |  |  |  |  | $ 690.66 | $ 599.40
Exercise of stock options and restricted stock units, shares reissued |  |  |  |  | 226,595 | 68,653

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- Definition Number of treasury shares reissued during the period as a result of the exercise of stock options and vesting of restricted stock units. + References No definition available. + Details
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- Definition Share Repurchase Program and Treasury Stock. + References No definition available. + Details
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- Definition Shares repurchased program-to-date by a Company's share repurchase program. + References No definition available. + Details
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- Definition The additional amount authorized by an entity's Board of Directors under a stock repurchase program. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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