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Condensed Quarterly Financial Data (Unaudited) (Notes) | 12 Months Ended
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Dec. 31, 2014
Condensed Quarterly Financial Data (Unaudited) [Abstract] |
Quarterly Financial Information [Text Block] | Condensed Quarterly Financial Data (Unaudited) Detailed below is unaudited quarterly financial data for the years ended December 31, 2014 and 2013.
| Three Month Period Ended March 31, 2014 |  | Three Month Period Ended June 30, 2014 |  | Three Month Period Ended September 30, 2014(1) |  | Three Month Period Ended December 31, 2014
(In thousands except per share amounts) |  |  |  |  |  |  |
INVESTMENT INCOME |  |  |  |  |  |  |
Interest income | $ | 21,496 |  |  | $ | 20,996 |  |  | $ | 22,353 |  |  | $ | 28,688 |
Other investment income | — |  |  | — |  |  | 168 |  |  | 150 |
Total investment income | 21,496 |  |  | 20,996 |  |  | 22,521 |  |  | 28,838 |
EXPENSES |  |  |  |  |  |  |
Base management fee | 2,364 |  |  | 2,368 |  |  | 3,056 |  |  | 2,963 |
Incentive fee | — |  |  | — |  |  | 1,400 |  |  | — |
Interest expense | 2,627 |  |  | 2,416 |  |  | 2,179 |  |  | 2,705 |
Other investment related expenses | 430 |  |  | 1,232 |  |  | 1,217 |  |  | 1,810 |
Other operating expenses | 1,994 |  |  | 1,974 |  |  | 2,070 |  |  | 2,295 |
Total expenses | 7,415 |  |  | 7,990 |  |  | 9,922 |  |  | 9,773 |
NET INVESTMENT INCOME | 14,081 |  |  | 13,006 |  |  | 12,599 |  |  | 19,065 |
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FINANCIAL DERIVATIVES, AND FOREIGN CURRENCY |  |  |  |  |  |  |
Net realized gain (loss) on investments, financial derivatives, and foreign currency transactions | 11,408 |  |  | 3,684 |  |  | (8,483 | ) |  | (2,447 | )
Change in net unrealized gain (loss) on investments, financial derivatives, and foreign currency translation | (2,651 | ) |  | 4,514 |  |  | 9,031 |  |  | (13,858 | )
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FINANCIAL DERIVATIVES, AND FOREIGN CURRENCY | 8,757 |  |  | 8,198 |  |  | 548 |  |  | (16,305 | )
NET INCREASE IN EQUITY RESULTING FROM OPERATIONS | 22,838 |  |  | 21,204 |  |  | 13,147 |  |  | 2,760 |
LESS: NET INCREASE IN EQUITY RESULTING FROM OPERATIONS ATTRIBUTABLE TO NON-CONTROLLING INTERESTS | 203 |  |  | 257 |  |  | 199 |  |  | 123 |
NET INCREASE IN SHAREHOLDERS' EQUITY RESULTING FROM OPERATIONS | $ | 22,635 |  |  | $ | 20,947 |  |  | $ | 12,948 |  |  | $ | 2,637 |
NET INCREASE IN SHAREHOLDERS' EQUITY RESULTING FROM OPERATIONS PER SHARE: |  |  |  |  |  |  |
Basic and Diluted(2) | $ | 0.88 |  |  | $ | 0.81 |  |  | $ | 0.46 |  |  | $ | 0.08 |
(1) | Prior period conformed to current period presentation.
(2) | For the year ended December 31, 2014 the sum of EPS for the four quarters of the year does not equal EPS as calculated for the entire year (see Note 11) as a result of issuances of common shares and LTIP units during the year, as EPS is calculated using average shares outstanding during the period.
| Three Month Period Ended March 31, 2013 |  | Three Month Period Ended June 30, 2013 |  | Three Month Period Ended September 30, 2013 |  | Three Month Period Ended December 31, 2013
(In thousands except per share amounts) |  |  |  |  |  |  |
INVESTMENT INCOME |  |  |  |  |  |  |
Interest income | $ | 18,382 |  |  | $ | 20,335 |  |  | $ | 24,069 |  |  | $ | 22,954 |
Other investment income | — |  |  | — |  |  | — |  |  | — |
Total investment income | 18,382 |  |  | 20,335 |  |  | 24,069 |  |  | 22,954 |
EXPENSES |  |  |  |  |  |  |
Base management fee | 1,967 |  |  | 2,405 |  |  | 2,378 |  |  | 2,365 |
Incentive fee | 2,055 |  |  | 1,182 |  |  | 2,038 |  |  | 3,091 |
Interest expense | 2,142 |  |  | 2,582 |  |  | 3,277 |  |  | 3,024 |
Other investment related expenses | — |  |  | 327 |  |  | 85 |  |  | 84 |
Other operating expenses | 1,649 |  |  | 1,671 |  |  | 1,885 |  |  | 1,878 |
Total expenses | 7,813 |  |  | 8,167 |  |  | 9,663 |  |  | 10,442 |
NET INVESTMENT INCOME | 10,569 |  |  | 12,168 |  |  | 14,406 |  |  | 12,512 |
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FINANCIAL DERIVATIVES, AND FOREIGN CURRENCY |  |  |  |  |  |  |
Net realized gain (loss) on investments, financial derivatives, and foreign currency transactions | 12,592 |  |  | 5,671 |  |  | 4,289 |  |  | (4,550 | )
Change in net unrealized gain (loss) on investments, financial derivatives, and foreign currency translation | 17,585 |  |  | (6,134 | ) |  | (6,872 | ) |  | 7,126 |
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FINANCIAL DERIVATIVES, AND FOREIGN CURRENCY | 30,177 |  |  | (463 | ) |  | (2,583 | ) |  | 2,576 |
NET INCREASE IN EQUITY RESULTING FROM OPERATIONS | 40,746 |  |  | 11,705 |  |  | 11,823 |  |  | 15,088 |
LESS: NET INCREASE IN EQUITY RESULTING FROM OPERATIONS ATTRIBUTABLE TO NON-CONTROLLING INTERESTS | 411 |  |  | 105 |  |  | 96 |  |  | 226 |
NET INCREASE IN SHAREHOLDERS' EQUITY RESULTING FROM OPERATIONS | $ | 40,335 |  |  | $ | 11,600 |  |  | $ | 11,727 |  |  | $ | 14,862 |
NET INCREASE IN SHAREHOLDERS' EQUITY RESULTING FROM OPERATIONS PER SHARE: |  |  |  |  |  |  |
Basic and Diluted(1) | $ | 1.94 |  |  | $ | 0.49 |  |  | $ | 0.45 |  |  | $ | 0.58 |
(1) | For the year ended December 31, 2013 the sum of EPS for the four quarters of the year does not equal EPS as calculated for the entire year (see Note 11) as a result of issuances of common shares and LTIP units during the year, as EPS is calculated using average shares outstanding during the period.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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