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Commercial Mortgage Banking - Schedule of Amortization Expense (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Servicing Asset at Amortized Cost [Line Items] |  |  |  |
2016 | $ 3,131 |  |  |
2017 | 4,169 |  |  |
2018 | 4,137 |  |  |
2019 | 3,980 |  |  |
2020 | 3,737 |  |  |
Thereafter | 8,870 |  |  |
Amortization expense | 28,024 | $ 28,168 | $ 28,391 | $ 30,140
Originated MSRs [Member] |  |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |  |
2016 | 2,340 |  |  |
2017 | 3,116 |  |  |
2018 | 3,091 |  |  |
2019 | 2,995 |  |  |
2020 | 2,851 |  |  |
Thereafter | 7,610 |  |  |
Amortization expense | 22,003 |  |  |
Purchased MSRs [Member] |  |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |  |
2016 | 791 |  |  |
2017 | 1,053 |  |  |
2018 | 1,046 |  |  |
2019 | 985 |  |  |
2020 | 886 |  |  |
Thereafter | 1,260 |  |  |
Amortization expense | $ 6,021 |  |  |

X
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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