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v2.4.1.9

Regulatory Capital - Well Capitalized Regulatory Requirements (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Actual |  |
Tier I Capital (to Average Assets) | $ 1,482,856 us-gaap_TierOneLeverageCapital | $ 1,413,988 us-gaap_TierOneLeverageCapital
Tier I Capital (to Risk Weighted Assets) | 1,482,856 us-gaap_TierOneRiskBasedCapital | 1,413,988 us-gaap_TierOneRiskBasedCapital
Total Capital (to Risk Weighted Assets) | 1,572,661 us-gaap_Capital | 1,497,830 us-gaap_Capital
Common Equity Tier I Capital (to Risk Weighted Assets) | 1,482,856 slm_Commonequitytier1capital |
Actual Ratio |  |
Tier I Capital (to Average Assets) | 11.50%us-gaap_TierOneLeverageCapitalToAverageAssets | 11.50%us-gaap_TierOneLeverageCapitalToAverageAssets
Tier I Capital (to Risk Weighted Assets) | 13.60%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets | 15.00%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Total Capital (to Risk Weighted Assets) | 14.40%us-gaap_CapitalToRiskWeightedAssets | 15.90%us-gaap_CapitalToRiskWeightedAssets
Common Equity Tier I Capital (to Risk Weighted Assets) | 13.60%slm_Commonequitytier1toriskweightedassets |
Well Capitalized Regulatory Requirements, Amount |  |
Tier I Capital (to Average Assets) | 642,524 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized | 614,709 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
Tier I Capital (to Risk Weighted Assets) | 873,897 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized | 565,148 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
Total Capital (to Risk Weighted Assets) | 1,092,371 us-gaap_CapitalRequiredToBeWellCapitalized | 941,913 us-gaap_CapitalRequiredToBeWellCapitalized
Common Equity Tier I Capital (to Risk Weighted Assets) | $ 710,041 slm_Commonequitycapitalrequiredtobewellcapitalized |
Well Capitalized Regulatory Requirements, Ratio |  |
Tier I Capital (to Average Assets) | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Tier I Capital (to Risk Weighted Assets) | 8.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Total Capital (to Risk Weighted Assets) | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Common Equity Tier I Capital (to Risk Weighted Assets) | 6.50%slm_Commonequitycapitalrequiredtobewellcapitalizedpercent |

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- Definition The amount of total capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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