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FAIR VALUE MEASUREMENTS - Fair value on a recurring basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities $ 12,622,006 $ 11,397,114
Equity securities 635,511 638,744
Other investments 1,009,373 830,219
Short-term investments 83,661 127,461
Derivative instruments 5,125 16,897
Derivative instruments 14,386 15,576
U.S. government and agency    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 1,712,469 1,656,069
Non-U.S. government    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 806,299 565,834
Corporate debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 5,297,866 4,600,743
Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 2,395,152 2,465,135
CMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 777,728 666,237
Non-Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 46,831 56,921
ABS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 1,436,281 1,222,214
Municipals    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 149,380 163,961
Common stocks    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 25,658 78
Exchange-traded funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 427,633 514,707
Bond mutual funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 182,220 123,959
Fair Value Measurements Recurring    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 12,622,006 11,397,114
Equity securities 635,511 638,744
Other investments 1,009,373 830,219
Short-term investments 83,661 127,461
Derivative instruments 5,125 16,897
Insurance-linked securities 25,090 25,023
Total Assets 14,380,766 13,035,458
Derivative instruments 14,386 15,576
Cash settled awards 21,535 48,432
Total Liabilities 35,921 64,008
Fair Value Measurements Recurring | U.S. government and agency    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 1,712,469 1,656,069
Fair Value Measurements Recurring | Non-U.S. government    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 806,299 565,834
Fair Value Measurements Recurring | Corporate debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 5,297,866 4,600,743
Fair Value Measurements Recurring | Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 2,395,152 2,465,135
Fair Value Measurements Recurring | CMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 777,728 666,237
Fair Value Measurements Recurring | Non-Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 46,831 56,921
Fair Value Measurements Recurring | ABS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 1,436,281 1,222,214
Fair Value Measurements Recurring | Municipals    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 149,380 163,961
Fair Value Measurements Recurring | Common stocks    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 25,658 78
Fair Value Measurements Recurring | Exchange-traded funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 427,633 514,707
Fair Value Measurements Recurring | Bond mutual funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 182,220 123,959
Fair Value Measurements Recurring | Hedge funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 363,811 498,150
Fair Value Measurements Recurring | Direct lending funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 250,681 134,650
Fair Value Measurements Recurring | Private equity funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 68,812 81,223
Fair Value Measurements Recurring | Real estate funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 50,009 13,354
Fair Value Measurements Recurring | Other privately held investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 46,430 42,142
Fair Value Measurements Recurring | CLO-Equities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 31,413 60,700
Fair Value Measurements Recurring | Overseas deposits    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 198,217 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 1,658,622 1,583,106
Equity securities 453,291 514,785
Other investments 0 0
Short-term investments 0 0
Derivative instruments 0 0
Insurance-linked securities 0 0
Total Assets 2,111,913 2,097,891
Derivative instruments 0 0
Cash settled awards 0 0
Total Liabilities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and agency    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 1,658,622 1,583,106
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. government    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | CMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | ABS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipals    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Common stocks    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 25,658 78
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Exchange-traded funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 427,633 514,707
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Bond mutual funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Hedge funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Direct lending funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Private equity funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other privately held investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | CLO-Equities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Overseas deposits    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 10,910,487 9,717,608
Equity securities 182,220 123,959
Other investments 198,217 0
Short-term investments 83,661 127,461
Derivative instruments 5,125 14,365
Insurance-linked securities 0 0
Total Assets 11,379,710 9,983,393
Derivative instruments 2,876 9,076
Cash settled awards 21,535 48,432
Total Liabilities 24,411 57,508
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | U.S. government and agency    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 53,847 72,963
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Non-U.S. government    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 806,299 565,834
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 5,244,969 4,524,868
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 2,395,152 2,465,135
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | CMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 777,728 663,176
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Non-Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 46,831 56,921
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | ABS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 1,436,281 1,204,750
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Municipals    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 149,380 163,961
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Common stocks    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Exchange-traded funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Bond mutual funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 182,220 123,959
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Hedge funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Direct lending funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Private equity funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Real estate funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Other privately held investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | CLO-Equities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Overseas deposits    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 198,217 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3)    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 52,897 96,400
Equity securities 0 0
Other investments 77,843 102,842
Short-term investments 0 0
Derivative instruments 0 2,532
Insurance-linked securities 25,090 25,023
Total Assets 155,830 226,797
Derivative instruments 11,510 6,500
Cash settled awards 0 0
Total Liabilities 11,510 6,500
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | U.S. government and agency    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Non-U.S. government    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 52,897 75,875
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | CMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 3,061
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Non-Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | ABS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 17,464
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Municipals    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Common stocks    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Exchange-traded funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Bond mutual funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Hedge funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Direct lending funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Private equity funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Real estate funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Other privately held investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 46,430 42,142
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | CLO-Equities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 31,413 60,700
Fair Value Measurements Recurring | Significant Unobservable Inputs (Level 3) | Overseas deposits    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Equity securities 0 0
Other investments 733,313 727,377
Short-term investments 0 0
Derivative instruments 0 0
Insurance-linked securities 0 0
Total Assets 733,313 727,377
Derivative instruments 0 0
Cash settled awards 0 0
Total Liabilities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | U.S. government and agency    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Non-U.S. government    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Corporate debt    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | CMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Non-Agency RMBS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | ABS    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Municipals    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fixed maturities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Common stocks    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Exchange-traded funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Bond mutual funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Hedge funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 363,811 498,150
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Direct lending funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 250,681 134,650
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Private equity funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 68,812 81,223
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Real estate funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 50,009 13,354
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Other privately held investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | CLO-Equities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments 0 0
Fair Value Measurements Recurring | Fair value based on NAV practical expedient | Overseas deposits    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other investments $ 0 $ 0