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Deposits (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Deposits [Line Items] |  |
Deposits | $ 1,337,725 | $ 1,394,331
Average balance, deposits | $ 1,380,520 | $ 1,459,067
Deposits, weighted average interest rate during the period | 0.87% | 0.74%
Non-interest-bearing transaction accounts |  |
Deposits [Line Items] |  |
Deposits | $ 255,521 | $ 277,445
Average balance, deposits | $ 234,487 | $ 230,907
Deposits, weighted average interest rate during the period | 0.00% | 0.00%
Interest-bearing transaction accounts |  |
Deposits [Line Items] |  |
Deposits | $ 272,057 | $ 217,625
Average balance, deposits | $ 285,216 | $ 226,540
Deposits, weighted average interest rate during the period | 0.73% | 0.59%
Money market accounts |  |
Deposits [Line Items] |  |
Deposits | $ 450,654 | $ 515,077
Average balance, deposits | $ 494,779 | $ 583,241
Deposits, weighted average interest rate during the period | 0.78% | 0.47%
Certificates of deposit |  |
Deposits [Line Items] |  |
Deposits | $ 78,062 | $ 76,199
Average balance, deposits | $ 76,424 | $ 56,667
Deposits, weighted average interest rate during the period | 1.25% | 1.00%
Wholesale deposits |  |
Deposits [Line Items] |  |
Deposits | $ 281,431 | $ 307,985
Average balance, deposits | $ 289,614 | $ 361,712
Deposits, weighted average interest rate during the period | 1.80% | 1.70%

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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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