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Regulatory Capital - Well Capitalized Regulatory Requirements (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Actual Amount |  |
Tier 1 Capital (to Average Assets) | $ 1,734,315 |
Tier 1 Capital (to Risk-Weighted Assets) | 1,734,315 | $ 1,413,988
Total Capital (to Risk-Weighted Assets) | 1,848,528 | 1,497,830
Tier 1 Capital (to Average Assets) | $ 1,734,315 | $ 1,413,988
Actual Ratio |  |
Tier 1 Capital (to Average Assets) | 14.40% |
Tier 1 Capital (to Risk-Weighted Assets) | 14.40% | 15.00%
Total Capital (to Risk-Weighted Assets) | 15.40% | 15.90%
Tier 1 Capital (to Average Assets) | 12.30% | 11.50%
Well Capitalized Regulatory Requirements, Amount |  |
Tier 1 Capital (to Average Assets) | $ 781,638 |
Tier 1 Capital (to Risk-Weighted Assets) | 962,017 | $ 565,148
Total Capital (to Risk-Weighted Assets) | 1,202,521 | 941,913
Tier 1 Capital (to Average Assets) | $ 704,979 | $ 614,709
Well Capitalized Regulatory Requirements, Ratio |  |
Tier 1 Capital (to Average Assets) | 6.50% |
Tier 1 Capital (to Risk-Weighted Assets) | 8.00% | 6.00%
Total Capital (to Risk-Weighted Assets) | 10.00% | 10.00%
Tier 1 Capital (to Average Assets) | 5.00% | 5.00%

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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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