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Deposits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Deposit [Line Items] |  |
Deposits | $ 1,394,331 | $ 1,538,855
Deposits, average balance | $ 1,459,067 | $ 1,591,971
Deposits, average rate | 0.74% | 0.74%
Non-interest-bearing transaction accounts |  |
Deposit [Line Items] |  |
Deposits | $ 277,445 | $ 252,638
Deposits, average balance | $ 230,907 | $ 246,182
Deposits, average rate | 0.00% | 0.00%
Interest-bearing transaction accounts |  |
Deposit [Line Items] |  |
Deposits | $ 217,625 | $ 183,992
Deposits, average balance | $ 226,540 | $ 169,571
Deposits, average rate | 0.59% | 0.27%
Money market accounts |  |
Deposit [Line Items] |  |
Deposits | $ 515,077 | $ 627,090
Deposits, average balance | $ 583,241 | $ 642,784
Deposits, average rate | 0.47% | 0.48%
Certificates of deposit |  |
Deposit [Line Items] |  |
Deposits | $ 76,199 | $ 58,454
Deposits, average balance | $ 56,667 | $ 65,608
Deposits, average rate | 1.00% | 0.90%
Wholesale deposits |  |
Deposit [Line Items] |  |
Deposits | $ 307,985 | $ 416,681
Deposits, average balance | $ 361,712 | $ 467,826
Deposits, average rate | 1.70% | 1.62%

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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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