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Regulatory Capital (Tables) | 12 Months Ended
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Dec. 31, 2015
Banking and Thrift [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations |
|  | Actual |  | "Well Capitalized" Regulatory Requirements
|  | Amount | Ratio |  | Amount |  | Ratio
As of December 31, 2015: |  |  |  |  |  |  |
Common Equity Tier 1 Capital (to Risk-Weighted Assets) |  | $ | 1,734,315 |  | 14.4 | % |  | $ | 781,638 |  | > | 6.5 | %
Tier 1 Capital (to Risk-Weighted Assets) |  | $ | 1,734,315 |  | 14.4 | % |  | $ | 962,017 |  | > | 8.0 | %
Total Capital (to Risk-Weighted Assets) |  | $ | 1,848,528 |  | 15.4 | % |  | $ | 1,202,521 |  | > | 10.0 | %
Tier 1 Capital (to Average Assets) |  | $ | 1,734,315 |  | 12.3 | % |  | $ | 704,979 |  | > | 5.0 | %
As of December 31, 2014: |  |  |  |  |  |  |
Tier 1 Capital (to Risk-Weighted Assets) |  | $ | 1,413,988 |  | 15.0 | % |  | $ | 565,148 |  | > | 6.0 | %
Total Capital (to Risk-Weighted Assets) |  | $ | 1,497,830 |  | 15.9 | % |  | $ | 941,913 |  | > | 10.0 | %
Tier 1 Capital (to Average Assets) |  | $ | 1,413,988 |  | 11.5 | % |  | $ | 614,709 |  | > | 5.0 | %

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 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 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 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958577-112826 + Details
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