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Federal Home Loan Bank Advances | 12 Months Ended
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Dec. 31, 2017
Investments in and Advances to Affiliates, Schedule of Investments [Abstract] |
Federal Home Loan Bank Advances | FEDERAL HOME LOAN BANK ADVANCES FHLB advances are collateralized by 1-4 family residential real estate loans, business loans and certain commercial real estate loans. At December 31, 2017 and 2016, the carrying value of the loans pledged to the FHLB of Des Moines was $1.1 billion and $773.5 million, respectively. The secured line of credit had availability of approximately $484.7 million at December 31, 2017. The Company also has an $12.9 million investment in the capital stock of the FHLB of Des Moines at December 31, 2017. The following table summarizes the type, maturity, and rate of the Company's FHLB advances at December 31:
|  | 2017 |  | 2016
($ in thousands) | Term | Outstanding Balance | Weighted Rate |  | Outstanding Balance | Weighted Rate
Non-amortizing fixed advance | Less than 1 year | $ | 172,743 |  | 1.56 | % |  | $ | — |  | — | %
Non-amortizing fixed advance | Greater than 1 year | — |  | — | % |  | — |  | — | %
Total Federal Home Loan Bank Advances |  | $ | 172,743 |  | 1.56 | % |  | $ | — |  | — | %
At December 31, 2017, the Company used $18.1 million of collateral value to secure confirming letters of credit for public unit deposits and industrial development bonds.

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- Definition The entire disclosure for borrowing from the Federal Home Loan Bank, including: (i) general description; (ii) title and nature of obligation; (iii) interest rate; (iv) payment terms; (v) maturity dates by year; (vi) collateral requirements; (vii) restrictive covenants; (viii) priority; (ix) conversion or redemption features; (x) carrying value of assets pledged as collateral; (xi) combined aggregate maturities for next five years; (xii) unused or available balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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