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Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract] |
Gain (loss) on securities | The amortized cost and fair values of securities available for sale and held to maturity were as follows.
| June 30, 2018 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | ($ in Thousands)
| Investment securities available for sale |  |  |  |  |  |  |
| U. S. Treasury securities | $ | 1,001 |  |  | $ | — |  |  | $ | (6 | ) |  | $ | 996 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 396,368 |  |  | 5,573 |  |  | (5,232 | ) |  | 396,709 |
| GNMA | 2,275,481 |  |  | 23 |  |  | (65,315 | ) |  | 2,210,189 |
| Private-label | 1,037 |  |  | — |  |  | (5 | ) |  | 1,031 |
| GNMA commercial mortgage-related securities | 1,400,680 |  |  | — |  |  | (52,399 | ) |  | 1,348,282 |
| FFELP asset backed securities | 298,263 |  |  | 1,679 |  |  | (111 | ) |  | 299,831 |
| Other debt securities | 3,000 |  |  | — |  |  | — |  |  | 3,000 |
| Other equity securities | 1,613 |  |  | — |  |  | — |  |  | 1,613 |
| Total investment securities available for sale | $ | 4,377,443 |  |  | $ | 7,275 |  |  | $ | (123,068 | ) |  | $ | 4,261,651 |
| Investment securities held to maturity |  |  |  |  |  |  |
| Obligations of state and political subdivisions (municipal securities) | $ | 1,593,147 |  |  | $ | 4,851 |  |  | $ | (17,698 | ) |  | $ | 1,580,300 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 97,822 |  |  | 191 |  |  | (2,306 | ) |  | 95,707 |
| GNMA | 388,174 |  |  | 1,969 |  |  | (13,020 | ) |  | 377,123 |
| GNMA commercial mortgage-related securities | 523,103 |  |  | 8,542 |  |  | (23,832 | ) |  | 507,813 |
| Total investment securities held to maturity | $ | 2,602,247 |  |  | $ | 15,553 |  |  | $ | (56,856 | ) |  | $ | 2,560,943 |
The proceeds from the sale of investment securities for the six months ended June 30, 2018 and 2017 are shown below.
| Six Months Ended June 30,
| 2018 |  | 2017
| ($ in Thousands)
Gross gains on available for sale securities | $ | — |  |  | $ | — |
Gross gains on held to maturity securities | — |  |  | 361 |
Total gains | — |  |  | 361 |
Gross losses on available for sale securities | (2,015 | ) |  | — |
Gross losses on held to maturity securities | $ | — |  |  | $ | (5 | )
Total losses | $ | (2,015 | ) |  | $ | (5 | )
Investment securities gains (losses), net | $ | (2,015 | ) |  | $ | 356 |
Proceeds from sales of investment securities | $ | 493,060 |  |  | $ | 16,059 |
Investment securities available for sale | A portion of the portfolio is also comprised of asset-backed securities backed by student loans made under the Federal Family Education Loan Program ("FFELP"). The amortized cost and fair values of securities available for sale and held to maturity were as follows.
| June 30, 2018 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | ($ in Thousands)
| Investment securities available for sale |  |  |  |  |  |  |
| U. S. Treasury securities | $ | 1,001 |  |  | $ | — |  |  | $ | (6 | ) |  | $ | 996 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 396,368 |  |  | 5,573 |  |  | (5,232 | ) |  | 396,709 |
| GNMA | 2,275,481 |  |  | 23 |  |  | (65,315 | ) |  | 2,210,189 |
| Private-label | 1,037 |  |  | — |  |  | (5 | ) |  | 1,031 |
| GNMA commercial mortgage-related securities | 1,400,680 |  |  | — |  |  | (52,399 | ) |  | 1,348,282 |
| FFELP asset backed securities | 298,263 |  |  | 1,679 |  |  | (111 | ) |  | 299,831 |
| Other debt securities | 3,000 |  |  | — |  |  | — |  |  | 3,000 |
| Other equity securities | 1,613 |  |  | — |  |  | — |  |  | 1,613 |
| Total investment securities available for sale | $ | 4,377,443 |  |  | $ | 7,275 |  |  | $ | (123,068 | ) |  | $ | 4,261,651 |
| Investment securities held to maturity |  |  |  |  |  |  |
| Obligations of state and political subdivisions (municipal securities) | $ | 1,593,147 |  |  | $ | 4,851 |  |  | $ | (17,698 | ) |  | $ | 1,580,300 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 97,822 |  |  | 191 |  |  | (2,306 | ) |  | 95,707 |
| GNMA | 388,174 |  |  | 1,969 |  |  | (13,020 | ) |  | 377,123 |
| GNMA commercial mortgage-related securities | 523,103 |  |  | 8,542 |  |  | (23,832 | ) |  | 507,813 |
| Total investment securities held to maturity | $ | 2,602,247 |  |  | $ | 15,553 |  |  | $ | (56,856 | ) |  | $ | 2,560,943 |
| December 31, 2017 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | ($ in Thousands)
| Investment securities available for sale |  |  |  |  |  |  |
| U. S. Treasury securities | $ | 1,003 |  |  | $ | — |  |  | $ | (7 | ) |  | $ | 996 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 457,680 |  |  | 9,722 |  |  | (2,634 | ) |  | 464,768 |
| GNMA | 1,944,453 |  |  | 275 |  |  | (31,378 | ) |  | 1,913,350 |
| Private-label | 1,067 |  |  | — |  |  | (8 | ) |  | 1,059 |
| GNMA commercial mortgage-related securities | 1,547,173 |  |  | 5 |  |  | (33,901 | ) |  | 1,513,277 |
| FFELP asset backed securities | 144,322 |  |  | 867 |  |  | (13 | ) |  | 145,176 |
| Other debt securities | 3,200 |  |  | — |  |  | (12 | ) |  | 3,188 |
| Other equity securities | 1,519 |  |  | 127 |  |  | (14 | ) |  | 1,632 |
| Total investment securities available for sale | $ | 4,100,417 |  |  | $ | 10,996 |  |  | $ | (67,967 | ) |  | $ | 4,043,446 |
| Investment securities held to maturity |  |  |  |  |  |  |
| Obligations of state and political subdivisions (municipal securities) | $ | 1,281,320 |  |  | $ | 13,899 |  |  | $ | (3,177 | ) |  | $ | 1,292,042 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 40,995 |  |  | 398 |  |  | (489 | ) |  | 40,904 |
| GNMA | 414,440 |  |  | 2,700 |  |  | (6,400 | ) |  | 410,740 |
| GNMA commercial mortgage-related securities | 546,098 |  |  | 9,546 |  |  | (15,756 | ) |  | 539,888 |
| Total investment securities held to maturity | $ | 2,282,853 |  |  | $ | 26,543 |  |  | $ | (25,822 | ) |  | $ | 2,283,574 |
Investment securities held to maturity | A portion of the portfolio is also comprised of asset-backed securities backed by student loans made under the Federal Family Education Loan Program ("FFELP"). The amortized cost and fair values of securities available for sale and held to maturity were as follows.
| June 30, 2018 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | ($ in Thousands)
| Investment securities available for sale |  |  |  |  |  |  |
| U. S. Treasury securities | $ | 1,001 |  |  | $ | — |  |  | $ | (6 | ) |  | $ | 996 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 396,368 |  |  | 5,573 |  |  | (5,232 | ) |  | 396,709 |
| GNMA | 2,275,481 |  |  | 23 |  |  | (65,315 | ) |  | 2,210,189 |
| Private-label | 1,037 |  |  | — |  |  | (5 | ) |  | 1,031 |
| GNMA commercial mortgage-related securities | 1,400,680 |  |  | — |  |  | (52,399 | ) |  | 1,348,282 |
| FFELP asset backed securities | 298,263 |  |  | 1,679 |  |  | (111 | ) |  | 299,831 |
| Other debt securities | 3,000 |  |  | — |  |  | — |  |  | 3,000 |
| Other equity securities | 1,613 |  |  | — |  |  | — |  |  | 1,613 |
| Total investment securities available for sale | $ | 4,377,443 |  |  | $ | 7,275 |  |  | $ | (123,068 | ) |  | $ | 4,261,651 |
| Investment securities held to maturity |  |  |  |  |  |  |
| Obligations of state and political subdivisions (municipal securities) | $ | 1,593,147 |  |  | $ | 4,851 |  |  | $ | (17,698 | ) |  | $ | 1,580,300 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 97,822 |  |  | 191 |  |  | (2,306 | ) |  | 95,707 |
| GNMA | 388,174 |  |  | 1,969 |  |  | (13,020 | ) |  | 377,123 |
| GNMA commercial mortgage-related securities | 523,103 |  |  | 8,542 |  |  | (23,832 | ) |  | 507,813 |
| Total investment securities held to maturity | $ | 2,602,247 |  |  | $ | 15,553 |  |  | $ | (56,856 | ) |  | $ | 2,560,943 |
| December 31, 2017 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
|  | ($ in Thousands)
| Investment securities available for sale |  |  |  |  |  |  |
| U. S. Treasury securities | $ | 1,003 |  |  | $ | — |  |  | $ | (7 | ) |  | $ | 996 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 457,680 |  |  | 9,722 |  |  | (2,634 | ) |  | 464,768 |
| GNMA | 1,944,453 |  |  | 275 |  |  | (31,378 | ) |  | 1,913,350 |
| Private-label | 1,067 |  |  | — |  |  | (8 | ) |  | 1,059 |
| GNMA commercial mortgage-related securities | 1,547,173 |  |  | 5 |  |  | (33,901 | ) |  | 1,513,277 |
| FFELP asset backed securities | 144,322 |  |  | 867 |  |  | (13 | ) |  | 145,176 |
| Other debt securities | 3,200 |  |  | — |  |  | (12 | ) |  | 3,188 |
| Other equity securities | 1,519 |  |  | 127 |  |  | (14 | ) |  | 1,632 |
| Total investment securities available for sale | $ | 4,100,417 |  |  | $ | 10,996 |  |  | $ | (67,967 | ) |  | $ | 4,043,446 |
| Investment securities held to maturity |  |  |  |  |  |  |
| Obligations of state and political subdivisions (municipal securities) | $ | 1,281,320 |  |  | $ | 13,899 |  |  | $ | (3,177 | ) |  | $ | 1,292,042 |
| Residential mortgage-related securities |  |  |  |  |  |  |
| FNMA / FHLMC | 40,995 |  |  | 398 |  |  | (489 | ) |  | 40,904 |
| GNMA | 414,440 |  |  | 2,700 |  |  | (6,400 | ) |  | 410,740 |
| GNMA commercial mortgage-related securities | 546,098 |  |  | 9,546 |  |  | (15,756 | ) |  | 539,888 |
| Total investment securities held to maturity | $ | 2,282,853 |  |  | $ | 26,543 |  |  | $ | (25,822 | ) |  | $ | 2,283,574 |
Amortized cost and fair values of investment securities by contractual maturity | The expected maturities of investment securities available for sale and held to maturity at June 30, 2018 are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
| Available for Sale |  | Held to Maturity
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
| ($ in Thousands)
Due in one year or less | $ | 3,001 |  |  | $ | 2,996 |  |  | $ | 46,938 |  |  | $ | 47,269 |
Due after one year through five years | 1,000 |  |  | 1,000 |  |  | 200,725 |  |  | 199,266 |
Due after five years through ten years | — |  |  | — |  |  | 366,997 |  |  | 361,260 |
Due after ten years | — |  |  | — |  |  | 978,487 |  |  | 972,504 |
Total debt securities | 4,001 |  |  | 3,996 |  |  | 1,593,147 |  |  | 1,580,300 |
Residential mortgage-related securities |  |  |  |  |  |  |
FNMA / FHLMC | 396,368 |  |  | 396,709 |  |  | 97,822 |  |  | 95,707 |
GNMA | 2,275,481 |  |  | 2,210,189 |  |  | 388,174 |  |  | 377,123 |
Private-label | 1,037 |  |  | 1,031 |  |  | — |  |  | — |
GNMA commercial mortgage-related securities | 1,400,680 |  |  | 1,348,282 |  |  | 523,103 |  |  | 507,813 |
FFELP asset backed securities | 298,263 |  |  | 299,831 |  |  | — |  |  | — |
Equity securities | 1,613 |  |  | 1,613 |  |  | — |  |  | — |
Total investment securities | $ | 4,377,443 |  |  | $ | 4,261,651 |  |  | $ | 2,602,247 |  |  | $ | 2,560,943 |
Ratio of Fair Value to Amortized Cost |  |  | 97.4 | % |  |  |  | 98.4 | %
Realized gains and losses and proceeds from sale | The following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2018.
| Less than 12 months |  | 12 months or more |  | Total
June 30, 2018 | Number of Securities |  | Unrealized Losses |  | Fair Value |  | Number of Securities |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value
| ($ in Thousands)
Investment securities available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | — |  |  | $ | — |  |  | $ | — |  |  | 1 |  |  | $ | (6 | ) |  | $ | 996 |  |  | $ | (6 | ) |  | $ | 996 |
Residential mortgage-related securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA / FHLMC | 19 |  |  | (1,613 | ) |  | 100,946 |  |  | 9 |  |  | (3,620 | ) |  | 128,509 |  |  | (5,233 | ) |  | 229,455 |
GNMA | 62 |  |  | (31,430 | ) |  | 1,453,394 |  |  | 29 |  |  | (33,885 | ) |  | 756,061 |  |  | (65,315 | ) |  | 2,209,455 |
Private-label | — |  |  | — |  |  | — |  |  | 1 |  |  | (5 | ) |  | 1,031 |  |  | (5 | ) |  | 1,031 |
GNMA commercial mortgage-related securities | 22 |  |  | (8,821 | ) |  | 284,733 |  |  | 80 |  |  | (43,577 | ) |  | 1,063,701 |  |  | (52,398 | ) |  | 1,348,434 |
FFELP asset backed securities | 7 |  |  | (111 | ) |  | 100,757 |  |  | — |  |  | — |  |  | — |  |  | (111 | ) |  | 100,757 |
Total | 110 |  |  | $ | (41,975 | ) |  | $ | 1,939,830 |  |  | 120 |  |  | $ | (81,093 | ) |  | $ | 1,950,298 |  |  | $ | (123,068 | ) |  | $ | 3,890,128 |
Investment securities held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations of state and political subdivisions (municipal securities) | 890 |  |  | $ | (10,814 | ) |  | $ | 609,381 |  |  | 142 |  |  | $ | (6,884 | ) |  | $ | 128,244 |  |  | $ | (17,698 | ) |  | $ | 737,625 |
Residential mortgage-related securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA / FHLMC | 25 |  |  | (1,518 | ) |  | 76,046 |  |  | 10 |  |  | (788 | ) |  | 14,728 |  |  | (2,306 | ) |  | 90,774 |
GNMA | 61 |  |  | (7,062 | ) |  | 236,008 |  |  | 20 |  |  | (5,957 | ) |  | 137,093 |  |  | (13,019 | ) |  | 373,101 |
GNMA commercial mortgage-related securities | 1 |  |  | (813 | ) |  | 29,243 |  |  | 24 |  |  | (23,019 | ) |  | 478,570 |  |  | (23,832 | ) |  | 507,813 |
Total | 977 |  |  | $ | (20,207 | ) |  | $ | 950,678 |  |  | 196 |  |  | $ | (36,648 | ) |  | $ | 758,635 |  |  | $ | (56,856 | ) |  | $ | 1,709,313 |
Unrealized losses and fair value of available for sale and held to maturity securities, by investment category and time length | The following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at June 30, 2018.
| Less than 12 months |  | 12 months or more |  | Total
June 30, 2018 | Number of Securities |  | Unrealized Losses |  | Fair Value |  | Number of Securities |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value
| ($ in Thousands)
Investment securities available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | — |  |  | $ | — |  |  | $ | — |  |  | 1 |  |  | $ | (6 | ) |  | $ | 996 |  |  | $ | (6 | ) |  | $ | 996 |
Residential mortgage-related securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA / FHLMC | 19 |  |  | (1,613 | ) |  | 100,946 |  |  | 9 |  |  | (3,620 | ) |  | 128,509 |  |  | (5,233 | ) |  | 229,455 |
GNMA | 62 |  |  | (31,430 | ) |  | 1,453,394 |  |  | 29 |  |  | (33,885 | ) |  | 756,061 |  |  | (65,315 | ) |  | 2,209,455 |
Private-label | — |  |  | — |  |  | — |  |  | 1 |  |  | (5 | ) |  | 1,031 |  |  | (5 | ) |  | 1,031 |
GNMA commercial mortgage-related securities | 22 |  |  | (8,821 | ) |  | 284,733 |  |  | 80 |  |  | (43,577 | ) |  | 1,063,701 |  |  | (52,398 | ) |  | 1,348,434 |
FFELP asset backed securities | 7 |  |  | (111 | ) |  | 100,757 |  |  | — |  |  | — |  |  | — |  |  | (111 | ) |  | 100,757 |
Total | 110 |  |  | $ | (41,975 | ) |  | $ | 1,939,830 |  |  | 120 |  |  | $ | (81,093 | ) |  | $ | 1,950,298 |  |  | $ | (123,068 | ) |  | $ | 3,890,128 |
Investment securities held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations of state and political subdivisions (municipal securities) | 890 |  |  | $ | (10,814 | ) |  | $ | 609,381 |  |  | 142 |  |  | $ | (6,884 | ) |  | $ | 128,244 |  |  | $ | (17,698 | ) |  | $ | 737,625 |
Residential mortgage-related securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA / FHLMC | 25 |  |  | (1,518 | ) |  | 76,046 |  |  | 10 |  |  | (788 | ) |  | 14,728 |  |  | (2,306 | ) |  | 90,774 |
GNMA | 61 |  |  | (7,062 | ) |  | 236,008 |  |  | 20 |  |  | (5,957 | ) |  | 137,093 |  |  | (13,019 | ) |  | 373,101 |
GNMA commercial mortgage-related securities | 1 |  |  | (813 | ) |  | 29,243 |  |  | 24 |  |  | (23,019 | ) |  | 478,570 |  |  | (23,832 | ) |  | 507,813 |
Total | 977 |  |  | $ | (20,207 | ) |  | $ | 950,678 |  |  | 196 |  |  | $ | (36,648 | ) |  | $ | 758,635 |  |  | $ | (56,856 | ) |  | $ | 1,709,313 |
For comparative purposes, the following represents gross unrealized losses and the related fair value of investment securities available for sale and held to maturity, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2017.
| Less than 12 months |  | 12 months or more |  | Total
December 31, 2017 | Number of Securities |  | Unrealized Losses |  | Fair Value |  | Number of Securities |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value
| ($ in Thousands)
Investment securities available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | 1 |  |  | $ | (7 | ) |  | $ | 996 |  |  | — |  |  | $ | — |  |  | $ | — |  |  | $ | (7 | ) |  | $ | 996 |
Residential mortgage-related securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA / FHLMC | 9 |  |  | (572 | ) |  | 69,939 |  |  | 9 |  |  | (2,062 | ) |  | 142,093 |  |  | (2,634 | ) |  | 212,032 |
GNMA | 44 |  |  | (8,927 | ) |  | 1,028,221 |  |  | 25 |  |  | (22,451 | ) |  | 737,198 |  |  | (31,378 | ) |  | 1,765,419 |
Private-label | — |  |  | — |  |  | — |  |  | 1 |  |  | (8 | ) |  | 1,059 |  |  | (8 | ) |  | 1,059 |
GNMA commercial mortgage-related securities | 33 |  |  | (5,554 | ) |  | 480,514 |  |  | 70 |  |  | (28,347 | ) |  | 1,026,642 |  |  | (33,901 | ) |  | 1,507,156 |
FFELP asset backed securities | 1 |  |  | (13 | ) |  | 12,158 |  |  | — |  |  | — |  |  | — |  |  | (13 | ) |  | 12,158 |
Other debt securities | 1 |  |  | (12 | ) |  | 188 |  |  | — |  |  | — |  |  | — |  |  | (12 | ) |  | 188 |
Other equity securities | 3 |  |  | (14 | ) |  | 1,487 |  |  | — |  |  | — |  |  | — |  |  | (14 | ) |  | 1,487 |
Total | 92 |  |  | $ | (15,099 | ) |  | $ | 1,593,503 |  |  | 105 |  |  | $ | (52,868 | ) |  | $ | 1,906,992 |  |  | $ | (67,967 | ) |  | $ | 3,500,495 |
Investment securities held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations of state and political subdivisions (municipal securities) | 157 |  |  | $ | (746 | ) |  | $ | 122,761 |  |  | 132 |  |  | $ | (2,431 | ) |  | $ | 127,043 |  |  | $ | (3,177 | ) |  | $ | 249,804 |
Residential mortgage-related securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FNMA / FHLMC | 8 |  |  | (73 | ) |  | 13,143 |  |  | 10 |  |  | (417 | ) |  | 16,262 |  |  | (490 | ) |  | 29,405 |
GNMA | 35 |  |  | (3,373 | ) |  | 268,388 |  |  | 18 |  |  | (3,026 | ) |  | 120,892 |  |  | (6,399 | ) |  | 389,280 |
GNMA commercial mortgage-related securities | 2 |  |  | (299 | ) |  | 52,997 |  |  | 23 |  |  | (15,457 | ) |  | 486,891 |  |  | (15,756 | ) |  | 539,888 |
Total | 202 |  |  | $ | (4,491 | ) |  | $ | 457,289 |  |  | 183 |  |  | $ | (21,331 | ) |  | $ | 751,088 |  |  | $ | (25,822 | ) |  | $ | 1,208,377 |

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- Definition Tabular disclosure of realized and unrealized gain (loss) on investment in security. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
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