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Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Short Term Borrowings | Short-term debt at December 31, 2017 and 2016, was as follows:
| December 31,
| 2017 |  | 2016
| Amount |  | Rate |  | Amount |  | Rate
(amounts in thousands) |
FHLB advances | $ | 1,611,860 |  |  | 1.47 | % |  | $ | 688,800 |  |  | 0.85 | %
Federal funds purchased | 155,000 |  |  | 1.50 |  |  | 83,000 |  |  | 0.74 |
Total short-term debt | $ | 1,766,860 |  |  |  |  | $ | 771,800 |  |  |
Summary of Bancorps Short Term Borrowings | The following is a summary of additional information relating to Customers' short-term debt:
| December 31,
| 2017 |  | 2016 |  | 2015
(amounts in thousands) |
FHLB advances |  |  |  |  |
Maximum outstanding at any month end | $ | 2,283,250 |  |  | $ | 1,697,800 |  |  | $ | 1,365,300 |
Average balance during the year | 1,415,755 |  |  | 965,293 |  |  | 844,835 |
Weighted-average interest rate during the year | 1.44 | % |  | 0.95 | % |  | 0.60 | %
Federal funds purchased |  |  |  |  |
Maximum outstanding at any month end | 238,000 |  |  | 137,000 |  |  | 85,000 |
Average balance during the year | 163,466 |  |  | 84,514 |  |  | 41,397 |
Weighted-average interest rate during the year | 1.19 | % |  | 0.58 | % |  | 0.35 | %

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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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