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Loans Receivable (Risk category of gross loans not subject to risk rating ) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Not Subject To Risk Rating [Line Items] |  |
Loans and Leases Receivable, Gross, Carrying Amount | $ 4,284,391 | $ 4,204,871
Financing Receivable, Individually Evaluated for Impairment | $ 68,580 | $ 72,285

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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + 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=65884687&loc=d3e4428-111522 + Details
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