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Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Balance Sheet Offsetting [Line Items] |  |
Repurchase agreements, amounts offset in balance sheet | $ 0 | $ 0
repurchase agreements, net amount presented in statement of financial position | 80,822 | 99,699
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities | (80,822) | (99,699)
securities sold under agreements to repurchase, amount not offset | 0 | 0
Interest Rate Contracts [Member] |  |
Balance Sheet Offsetting [Line Items] |  |
Derivative Assets, Gross Amounts Offset in the Balance Sheets | 0 | 0
Derivative Asset | 9,012 | 12,438
Derivative, Collateral, Obligation to Return Securities | 0 | 0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 9,012 | 12,438
Derivative Liability, Gross Amounts Offset in Balance Sheets | 0 | 0
Derivative Liability | 9,036 | 12,478
Derivative, Collateral, Right to Reclaim Securities | (9,036) | (12,478)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 0 | 0
Available-for-sale Securities [Member] |  |
Balance Sheet Offsetting [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | $ 80,822 | $ 99,699

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
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