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Loans Receivable - Interest Rate Terms (Details) $ in Thousands | Sep. 30, 2017 USD ($)
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Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans at fixed-rate | $ 7,408,460
Loans at fixed-rate, percent | 60.70%
Loans at adjustable-rate | $ 4,792,927
Loans at adjustable-rate, percent | 39.30%
Within 1 year |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans at fixed-rate | $ 71,810
Loans at fixed-rate, percent | 0.60%
Loans at adjustable-rate | $ 3,157,055
Loans at adjustable-rate, percent | 25.90%
1 to 3 years |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans at fixed-rate | $ 216,724
Loans at fixed-rate, percent | 1.80%
Loans at adjustable-rate | $ 498,844
Loans at adjustable-rate, percent | 4.10%
3 to 5 years |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans at fixed-rate | $ 308,967
Loans at fixed-rate, percent | 2.50%
Loans at adjustable-rate | $ 624,254
Loans at adjustable-rate, percent | 5.10%
5 to 10 years |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans at fixed-rate | $ 847,518
Loans at fixed-rate, percent | 6.90%
Loans at adjustable-rate | $ 512,774
Loans at adjustable-rate, percent | 4.20%
10 to 20 years |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans at fixed-rate | $ 1,047,541
Loans at fixed-rate, percent | 8.60%
Loans at adjustable-rate | $ 0
Loans at adjustable-rate, percent | 0.00%
Over 20 years |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans at fixed-rate | $ 4,915,900
Loans at fixed-rate, percent | 40.30%
Loans at adjustable-rate | $ 0
Loans at adjustable-rate, percent | 0.00%

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- Definition Amount of loan with fixed rate of interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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- Definition Amount of loan with variable or adjustable rate of interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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