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Business Segment Reporting - Core Earnings - Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |
Net interest income | $ 45,058 | $ 39,562 | $ 132,220 | $ 116,364 |
Less: reconciling adjustments(1)(2)(3) | 0 | 0 | 0 | 0 |
Net Effective Spread | 0 | 0 | 0 | 0 |
Guaranty Fee Income | 3,490 | 3,314 | 10,470 | 10,630 |
Other Non-Interest Income (Expense), Excluding Guarantee and Commitment Fees | 949 | 985 | 588 | 4,209 |
Non-interest income | 4,439 | 4,299 | 11,058 | 14,839 |
Provision for loan losses | (99) | (270) | (92) | (1,234) |
Provision for Other Credit Losses | 102 | (114) | (77) | (60) |
Noninterest Expense, Excluding Loan, Lease and Other Losses | (11,752) | (10,502) | (36,136) | (32,495) |
Non-interest expense | (11,650) | (10,616) | (36,213) | (32,555) |
Income Tax Expense (Benefit) | (7,979) | (11,193) | (21,749) | (33,103) |
Net income | 29,769 | 21,782 | 85,224 | 64,311 |
Net income | 37,748 | 32,975 | 106,973 | 97,414 |
Preferred Stock Dividends, Income Statement Impact | (3,295) | (3,295) | (9,886) | (9,886) |
Less: Net loss attributable to non-controlling interest | 0 | 0 | 0 | 165 |
Net Income (Loss) Available to Common Stockholders, Basic | 26,474 | 18,487 | 75,338 | 54,590 |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |
Total Assets | 18,474,034 | 17,690,238 | 18,474,034 | 17,690,238 | $ 17,792,274
On and Off Balance Sheet Program Assets, At Principal Balance | 19,540,586 | 18,644,273 | 19,540,586 | 18,644,273 |
Farm & Ranch [Member] |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |
Net interest income | 16,425 | 13,609 | 47,255 | 39,701 |
Less: reconciling adjustments(1)(2)(3) | (2,538) | (2,306) | (7,481) | (6,729) |
Net Effective Spread | 13,887 | 11,303 | 39,774 | 32,972 |
Guaranty Fee Income | 4,489 | 4,236 | 13,356 | 12,722 |
Other Non-Interest Income (Expense), Excluding Guarantee and Commitment Fees | 294 | 214 | 1,193 | 1,402 |
Non-interest income | 4,783 | 4,450 | 14,549 | 14,124 |
Provision for loan losses | (99) | (270) | (92) | (1,234) |
Provision for Other Credit Losses | 102 | (114) | (77) | (60) |
Noninterest Expense, Excluding Loan, Lease and Other Losses | (4,456) | (4,077) | (13,930) | (12,588) |
Non-interest expense | (4,354) | (4,191) | (14,007) | (12,648) |
Segment core earnings before income taxes | 14,217 | 11,292 | 40,224 | 33,214 |
Income Tax Expense (Benefit) | (2,986) | (3,952) | (8,447) | (11,625) |
Segment core earnings before preferred stock dividends and attibution of income to non-controlling interest - preferred stock dividends | 11,231 | 7,340 | 31,777 | 21,589 |
Preferred Stock Dividends, Income Statement Impact | 0 | 0 | 0 | 0 |
Less: Net loss attributable to non-controlling interest |  | 0 |  | 0 |
Segment core earnings | 11,231 | 7,340 | 31,777 | 21,589 |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |
Total Assets | 4,438,128 | 4,128,778 | 4,438,128 | 4,128,778 |
On and Off Balance Sheet Program Assets, At Principal Balance | 7,072,018 | 6,557,030 | 7,072,018 | 6,557,030 |
USDA Guarantees [Member] |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |
Net interest income | 5,304 | 5,288 | 15,446 | 15,747 |
Less: reconciling adjustments(1)(2)(3) | (677) | (560) | (2,021) | (1,907) |
Net Effective Spread | 4,627 | 4,728 | 13,425 | 13,840 |
Guaranty Fee Income | 214 | 130 | 570 | 303 |
Other Non-Interest Income (Expense), Excluding Guarantee and Commitment Fees | 5 | 9 | 18 | 34 |
Non-interest income | 219 | 139 | 588 | 337 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Provision for Other Credit Losses | 0 | 0 | 0 | 0 |
Noninterest Expense, Excluding Loan, Lease and Other Losses | (1,288) | (1,080) | (3,793) | (3,333) |
Non-interest expense | (1,288) | (1,080) | (3,793) | (3,333) |
Segment core earnings before income taxes | 3,558 | 3,787 | 10,220 | 10,844 |
Income Tax Expense (Benefit) | (747) | (1,325) | (2,146) | (3,795) |
Segment core earnings before preferred stock dividends and attibution of income to non-controlling interest - preferred stock dividends | 2,811 | 2,462 | 8,074 | 7,049 |
Preferred Stock Dividends, Income Statement Impact | 0 | 0 | 0 | 0 |
Less: Net loss attributable to non-controlling interest |  | 0 |  | 0 |
Segment core earnings | 2,811 | 2,462 | 8,074 | 7,049 |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |
Total Assets | 2,212,515 | 2,165,749 | 2,212,515 | 2,165,749 |
On and Off Balance Sheet Program Assets, At Principal Balance | 2,471,251 | 2,298,956 | 2,471,251 | 2,298,956 |
Rural Utilities [Member] |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |
Net interest income | 3,081 | 2,230 | 8,931 | 8,181 |
Less: reconciling adjustments(1)(2)(3) | (204) | 535 | (181) | (179) |
Net Effective Spread | 2,877 | 2,765 | 8,750 | 8,002 |
Guaranty Fee Income | 376 | 476 | 1,227 | 1,455 |
Other Non-Interest Income (Expense), Excluding Guarantee and Commitment Fees | 15 | 5 | 25 | 15 |
Non-interest income | 391 | 481 | 1,252 | 1,470 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Provision for Other Credit Losses | 0 | 0 | 0 | 0 |
Noninterest Expense, Excluding Loan, Lease and Other Losses | (732) | (608) | (2,144) | (1,838) |
Non-interest expense | (732) | (608) | (2,144) | (1,838) |
Segment core earnings before income taxes | 2,536 | 2,638 | 7,858 | 7,634 |
Income Tax Expense (Benefit) | (533) | (923) | (1,651) | (2,671) |
Segment core earnings before preferred stock dividends and attibution of income to non-controlling interest - preferred stock dividends | 2,003 | 1,715 | 6,207 | 4,963 |
Preferred Stock Dividends, Income Statement Impact | 0 | 0 | 0 | 0 |
Less: Net loss attributable to non-controlling interest |  | 0 |  | 0 |
Segment core earnings | 2,003 | 1,715 | 6,207 | 4,963 |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |
Total Assets | 956,204 | 1,073,525 | 956,204 | 1,073,525 |
On and Off Balance Sheet Program Assets, At Principal Balance | 1,632,037 | 1,886,445 | 1,632,037 | 1,886,445 |
Institutional Credit [Member] |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |
Net interest income | 17,600 | 15,431 | 54,237 | 44,364 |
Less: reconciling adjustments(1)(2)(3) | (1,958) | (976) | (8,551) | (2,827) |
Net Effective Spread | 15,642 | 14,455 | 45,686 | 41,537 |
Guaranty Fee Income | 91 | 93 | 271 | 713 |
Other Non-Interest Income (Expense), Excluding Guarantee and Commitment Fees | 0 | 0 | 0 | 0 |
Non-interest income | 91 | 93 | 271 | 713 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Provision for Other Credit Losses | 0 | 0 | 0 | 0 |
Noninterest Expense, Excluding Loan, Lease and Other Losses | (1,844) | (1,670) | (5,720) | (4,813) |
Non-interest expense | (1,844) | (1,670) | (5,720) | (4,813) |
Segment core earnings before income taxes | 13,889 | 12,878 | 40,237 | 37,437 |
Income Tax Expense (Benefit) | (2,917) | (4,507) | (8,450) | (13,103) |
Segment core earnings before preferred stock dividends and attibution of income to non-controlling interest - preferred stock dividends | 10,972 | 8,371 | 31,787 | 24,334 |
Preferred Stock Dividends, Income Statement Impact | 0 | 0 | 0 | 0 |
Less: Net loss attributable to non-controlling interest |  | 0 |  | 0 |
Segment core earnings | 10,972 | 8,371 | 31,787 | 24,334 |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |
Total Assets | 8,103,181 | 7,612,572 | 8,103,181 | 7,612,572 |
On and Off Balance Sheet Program Assets, At Principal Balance | 8,365,280 | 7,901,842 | 8,365,280 | 7,901,842 |
Corporate Segment [Member] |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |
Net interest income | 2,648 | 3,004 | 6,351 | 8,371 |
Less: reconciling adjustments(1)(2)(3) | (604) | (279) | (1,646) | (886) |
Net Effective Spread | 2,044 | 2,725 | 4,705 | 7,485 |
Guaranty Fee Income | 0 | 0 | 0 | 0 |
Other Non-Interest Income (Expense), Excluding Guarantee and Commitment Fees | (245) | 78 | (594) | 199 |
Non-interest income | (245) | 78 | (594) | 199 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Provision for Other Credit Losses | 0 | 0 | 0 | 0 |
Noninterest Expense, Excluding Loan, Lease and Other Losses | (3,432) | (3,067) | (10,549) | (9,923) |
Non-interest expense | (3,432) | (3,067) | (10,549) | (9,923) |
Segment core earnings before income taxes | (1,633) | (264) | (6,438) | (2,239) |
Income Tax Expense (Benefit) | 292 | 439 | 2,067 | 1,775 |
Segment core earnings before preferred stock dividends and attibution of income to non-controlling interest - preferred stock dividends | (1,341) | 175 | (4,371) | (464) |
Preferred Stock Dividends, Income Statement Impact | (3,295) | (3,295) | (9,886) | (9,886) |
Less: Net loss attributable to non-controlling interest |  | 0 |  | 165 |
Segment core earnings | (4,636) | (3,120) | (14,257) | (10,185) |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |
Total Assets | 2,764,006 | 2,709,614 | 2,764,006 | 2,709,614 |
Segment Reconciling Items [Member] |  |  |  |  |
Segment Reporting Information, Profit (Loss) [Abstract] |  |  |  |  |
Net interest income | 0 | 0 | 0 | 0 |
Less: reconciling adjustments(1)(2)(3) | 5,981 | 3,586 | 19,880 | 12,528 |
Net Effective Spread | 5,981 | 3,586 | 19,880 | 12,528 |
Guaranty Fee Income | (1,680) | (1,621) | (4,954) | (4,563) |
Other Non-Interest Income (Expense), Excluding Guarantee and Commitment Fees | 880 | 679 | (54) | 2,559 |
Non-interest income | (800) | (942) | (5,008) | (2,004) |
Provision for loan losses | 0 | 0 | 0 | 0 |
Provision for Other Credit Losses | 0 | 0 | 0 | 0 |
Noninterest Expense, Excluding Loan, Lease and Other Losses | 0 | 0 | 0 | 0 |
Non-interest expense | 0 | 0 | 0 | 0 |
Segment core earnings before income taxes | 5,181 | 2,644 | 14,872 | 10,524 |
Income Tax Expense (Benefit) | (1,088) | (925) | (3,122) | (3,684) |
Segment core earnings before preferred stock dividends and attibution of income to non-controlling interest - preferred stock dividends | 4,093 | 1,719 | 11,750 | 6,840 |
Preferred Stock Dividends, Income Statement Impact | 0 | 0 | 0 | 0 |
Less: Net loss attributable to non-controlling interest |  | 0 |  | 0 |
Segment core earnings | 4,093 | 1,719 | 11,750 | 6,840 |
Segment Reporting Information, Additional Information [Abstract] |  |  |  |  |
Total Assets | 0 | 0 | 0 | 0 |
On and Off Balance Sheet Program Assets, At Principal Balance | $ 0 | $ 0 | $ 0 | $ 0 |

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