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Loans and Allowances for Credit Losses, Credit Quality Indicators (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment $ 16,203,838   $ 15,297,889 $ 15,341,394    
Non-Graded, Recorded Investment 1,799,858   1,855,535 1,842,251    
Total 18,003,696   17,153,424 17,183,645    
Related Allowance [Abstract]            
Internally Risk Graded, Allowance 181,303   189,412 204,117    
Non-Graded, Allowance 18,367   19,053 18,570    
Total 215,142 $ 223,967 230,682 250,061 $ 248,710 $ 246,159
Commercial            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 11,323,917   10,706,035 10,612,477    
Non-Graded, Recorded Investment 25,122   27,940 25,478    
Total 11,349,039   10,733,975 10,637,955    
Related Allowance [Abstract]            
Internally Risk Graded, Allowance 112,842   123,383 136,819    
Non-Graded, Allowance 880   886 923    
Total 113,722 120,083 124,269 137,742 137,616 140,213
Commercial | Energy [Member]            
Recorded Investment [Abstract]            
Total 3,147,219   2,930,156 2,847,240    
Commercial | Services [Member]            
Recorded Investment [Abstract]            
Total 2,944,499   2,986,949 2,958,827    
Commercial | Wholesale/retail [Member]            
Recorded Investment [Abstract]            
Total 1,699,554   1,471,256 1,543,695    
Commercial | Manufacturing [Member]            
Recorded Investment [Abstract]            
Total 647,816   496,774 546,137    
Commercial | Healthcare [Member]            
Recorded Investment [Abstract]            
Total 2,353,722   2,314,753 2,221,518    
Commercial | Other commercial and industrial [Member]            
Recorded Investment [Abstract]            
Total 556,229   534,087 520,538    
Commercial real estate            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 3,712,220   3,479,987 3,688,592    
Non-Graded, Recorded Investment 0   0 0    
Total 3,712,220   3,479,987 3,688,592    
Related Allowance [Abstract]            
Internally Risk Graded, Allowance 58,758   56,621 58,580    
Non-Graded, Allowance 0   0 0    
Total 58,758 57,070 56,621 58,580 58,343 50,749
Commercial real estate | Residential construction and land development [Member]            
Recorded Investment [Abstract]            
Total 118,999   117,245 141,592    
Commercial real estate | Retail [Member]            
Recorded Investment [Abstract]            
Total 768,024   691,532 722,805    
Commercial real estate | Office [Member]            
Recorded Investment [Abstract]            
Total 820,127   831,770 862,973    
Commercial real estate | Multifamily [Member]            
Recorded Investment [Abstract]            
Total 1,056,984   980,017 952,380    
Commercial real estate | Industrial [Member]            
Recorded Investment [Abstract]            
Total 653,384   573,014 693,635    
Commercial real estate | Other commercial real estate [Member]            
Recorded Investment [Abstract]            
Total 294,702   286,409 315,207    
Residential mortgage            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 250,081   234,477 216,007    
Non-Graded, Recorded Investment 1,692,169   1,739,209 1,723,191    
Total 1,942,250   1,973,686 1,939,198    
Related Allowance [Abstract]            
Internally Risk Graded, Allowance 3,082   2,947 2,976    
Non-Graded, Allowance 15,462   15,504 15,283    
Total 18,544 18,431 18,451 18,259 18,177 18,224
Residential mortgage | Permanent mortgage [Member]            
Recorded Investment [Abstract]            
Total 1,068,412   1,043,435 989,040    
Residential mortgage | Permanent mortgages guaranteed by US government agencies [Member]            
Recorded Investment [Abstract]            
Total 169,653   197,506 191,729    
Residential mortgage | Home equity [Member]            
Recorded Investment [Abstract]            
Total 704,185   732,745 758,429    
Personal            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 917,620   877,390 824,318    
Non-Graded, Recorded Investment 82,567   88,386 93,582    
Total 1,000,187   965,776 917,900    
Related Allowance [Abstract]            
Internally Risk Graded, Allowance 6,621   6,461 5,742    
Non-Graded, Allowance 2,025   2,663 2,364    
Total 8,646 8,408 9,124 8,106 7,247 8,773
Specific Allowance [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 16,203,838   15,297,889 15,341,394    
Non-Graded, Recorded Investment 1,799,858   1,855,535 1,842,251    
Total 18,003,696   17,153,424 17,183,645    
Related Allowance [Abstract]            
Internally Risk Graded, Allowance 181,303   189,412 204,117    
Non-Graded, Allowance 18,367   19,053 18,570    
Total 199,670   208,465 222,687    
Nonspecific Allowance [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Non-Graded, Recorded Investment 0   0 0    
Total 0   0 0    
Related Allowance [Abstract]            
Internally Risk Graded, Allowance 0   0 0    
Non-Graded, Allowance 0   0 0    
Total 15,472 $ 19,975 22,217 27,374 $ 27,327 $ 28,200
Performing [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 1,758,197   1,808,995 1,799,001    
Performing [Member] | Commercial            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 25,009   27,870 25,374    
Performing [Member] | Commercial | Energy [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial | Services [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial | Wholesale/retail [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial | Manufacturing [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial | Healthcare [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial | Other commercial and industrial [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 25,009   27,870 25,374    
Performing [Member] | Commercial real estate            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial real estate | Residential construction and land development [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial real estate | Retail [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial real estate | Office [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial real estate | Multifamily [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial real estate | Industrial [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Commercial real estate | Other commercial real estate [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 0   0 0    
Performing [Member] | Residential mortgage            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 1,650,882   1,692,925 1,680,229    
Performing [Member] | Residential mortgage | Permanent mortgage [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 796,282   784,928 750,891    
Performing [Member] | Residential mortgage | Permanent mortgages guaranteed by US government agencies [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 162,086   188,327 182,677    
Performing [Member] | Residential mortgage | Home equity [Member]            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 692,514   719,670 746,661    
Performing [Member] | Personal            
Recorded Investment [Abstract]            
Non-Graded, Recorded Investment 82,306   88,200 93,398    
Performing [Member] | Pass [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 15,815,960   14,797,279 14,613,315    
Performing [Member] | Pass [Member] | Commercial            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 10,971,935   10,226,089 9,902,434    
Performing [Member] | Pass [Member] | Commercial | Energy [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 2,936,184   2,632,986 2,376,368    
Performing [Member] | Pass [Member] | Commercial | Services [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 2,903,168   2,943,869 2,921,510    
Performing [Member] | Pass [Member] | Commercial | Wholesale/retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 1,679,834   1,443,917 1,507,063    
Performing [Member] | Pass [Member] | Commercial | Manufacturing [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 620,687   472,869 513,442    
Performing [Member] | Pass [Member] | Commercial | Healthcare [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 2,319,035   2,253,497 2,130,339    
Performing [Member] | Pass [Member] | Commercial | Other commercial and industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 513,027   478,951 453,712    
Performing [Member] | Pass [Member] | Commercial real estate            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 3,680,096   3,463,002 3,675,014    
Performing [Member] | Pass [Member] | Commercial real estate | Residential construction and land development [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 116,821   113,190 138,790    
Performing [Member] | Pass [Member] | Commercial real estate | Retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 745,691   686,915 720,730    
Performing [Member] | Pass [Member] | Commercial real estate | Office [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 812,848   824,408 859,722    
Performing [Member] | Pass [Member] | Commercial real estate | Multifamily [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 1,056,953   979,969 947,950    
Performing [Member] | Pass [Member] | Commercial real estate | Industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 653,384   573,014 693,635    
Performing [Member] | Pass [Member] | Commercial real estate | Other commercial real estate [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 294,399   285,506 314,187    
Performing [Member] | Pass [Member] | Residential mortgage            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 246,470   232,492 212,563    
Performing [Member] | Pass [Member] | Residential mortgage | Permanent mortgage [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 246,470   232,492 212,563    
Performing [Member] | Pass [Member] | Residential mortgage | Permanent mortgages guaranteed by US government agencies [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Pass [Member] | Residential mortgage | Home equity [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Pass [Member] | Personal            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 917,459   875,696 823,304    
Performing [Member] | Other Loans Especially Mentioned [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 123,856   118,175 198,575    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 93,803   103,324 192,204    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial | Energy [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 52,350   60,288 120,473    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial | Services [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 30,564   13,927 12,452    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial | Wholesale/retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 900   19,263 16,224    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial | Manufacturing [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 7,559   6,653 6,540    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial | Healthcare [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 2,030   3,186 33,554    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial | Other commercial and industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 400   7 2,961    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial real estate            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 30,005   13,303 4,629    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial real estate | Residential construction and land development [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 1,828   1,828 0    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial real estate | Retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 21,173   4,243 1,774    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial real estate | Office [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 7,004   7,087 2,855    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial real estate | Multifamily [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial real estate | Industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Other Loans Especially Mentioned [Member] | Commercial real estate | Other commercial real estate [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   145 0    
Performing [Member] | Other Loans Especially Mentioned [Member] | Residential mortgage            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 1,693    
Performing [Member] | Other Loans Especially Mentioned [Member] | Residential mortgage | Permanent mortgage [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 1,693    
Performing [Member] | Other Loans Especially Mentioned [Member] | Residential mortgage | Permanent mortgages guaranteed by US government agencies [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Other Loans Especially Mentioned [Member] | Residential mortgage | Home equity [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Other Loans Especially Mentioned [Member] | Personal            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 48   1,548 49    
Performing [Member] | Substandard [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 140,026   241,101 327,315    
Performing [Member] | Substandard [Member] | Commercial            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 137,314   239,389 320,786    
Performing [Member] | Substandard [Member] | Commercial | Energy [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 93,088   144,598 226,407    
Performing [Member] | Substandard [Member] | Commercial | Services [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 6,390   26,533 17,111    
Performing [Member] | Substandard [Member] | Commercial | Wholesale/retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 4,725   5,502 9,788    
Performing [Member] | Substandard [Member] | Commercial | Manufacturing [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 16,579   11,290 16,499    
Performing [Member] | Substandard [Member] | Commercial | Healthcare [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 16,532   43,305 33,120    
Performing [Member] | Substandard [Member] | Commercial | Other commercial and industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   8,161 17,861    
Performing [Member] | Substandard [Member] | Commercial real estate            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 123   827 5,174    
Performing [Member] | Substandard [Member] | Commercial real estate | Residential construction and land development [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   395 751    
Performing [Member] | Substandard [Member] | Commercial real estate | Retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 92   98 0    
Performing [Member] | Substandard [Member] | Commercial real estate | Office [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Substandard [Member] | Commercial real estate | Multifamily [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 31   48 4,420    
Performing [Member] | Substandard [Member] | Commercial real estate | Industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Substandard [Member] | Commercial real estate | Other commercial real estate [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   286 3    
Performing [Member] | Substandard [Member] | Residential mortgage            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 2,555   822 478    
Performing [Member] | Substandard [Member] | Residential mortgage | Permanent mortgage [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 2,555   822 478    
Performing [Member] | Substandard [Member] | Residential mortgage | Permanent mortgages guaranteed by US government agencies [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Substandard [Member] | Residential mortgage | Home equity [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Performing [Member] | Substandard [Member] | Personal            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 34   63 877    
Nonaccrual [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 123,996   141,334 202,189    
Non-Graded, Recorded Investment 41,661   46,540 43,250    
Nonaccrual [Member] | Commercial            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 120,865   137,233 197,053    
Non-Graded, Recorded Investment 113   70 104    
Nonaccrual [Member] | Commercial | Energy [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 65,597   92,284 123,992    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial | Services [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 4,377   2,620 7,754    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial | Wholesale/retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 14,095   2,574 10,620    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial | Manufacturing [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 2,991   5,962 9,656    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial | Healthcare [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 16,125   14,765 24,505    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial | Other commercial and industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 17,680   19,028 20,526    
Non-Graded, Recorded Investment 113   70 104    
Nonaccrual [Member] | Commercial real estate            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 1,996   2,855 3,775    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial real estate | Residential construction and land development [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 350   1,832 2,051    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial real estate | Retail [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 1,068   276 301    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial real estate | Office [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 275   275 396    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial real estate | Multifamily [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 10    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial real estate | Industrial [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Commercial real estate | Other commercial real estate [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 303   472 1,017    
Non-Graded, Recorded Investment 0   0 0    
Nonaccrual [Member] | Residential mortgage            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 1,056   1,163 1,273    
Non-Graded, Recorded Investment 41,287   46,284 42,962    
Nonaccrual [Member] | Residential mortgage | Permanent mortgage [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 1,056   1,163 1,273    
Non-Graded, Recorded Investment 22,049   24,030 22,142    
Nonaccrual [Member] | Residential mortgage | Permanent mortgages guaranteed by US government agencies [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Non-Graded, Recorded Investment 7,567   9,179 9,052    
Nonaccrual [Member] | Residential mortgage | Home equity [Member]            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 0   0 0    
Non-Graded, Recorded Investment 11,671   13,075 11,768    
Nonaccrual [Member] | Personal            
Recorded Investment [Abstract]            
Internally Risk Graded, Recorded Investment 79   83 88    
Non-Graded, Recorded Investment $ 261   $ 186 $ 184