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Deposits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Deposits [Line Items]
Deposits	$ 1,371,158		$ 1,394,331
Average balance, deposits	$ 1,422,883	$ 1,459,067
Deposits, weighted average interest rate during the period	0.80%	0.74%
Non-interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 240,422		277,445
Average balance, deposits	$ 228,557	$ 230,907
Deposits, weighted average interest rate during the period	0.00%	0.00%
Interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 262,766		217,625
Average balance, deposits	$ 297,730	$ 226,540
Deposits, weighted average interest rate during the period	0.55%	0.59%
Money market accounts
Deposits [Line Items]
Deposits	$ 498,310		515,077
Average balance, deposits	$ 514,837	$ 583,241
Deposits, weighted average interest rate during the period	0.66%	0.47%
Certificates of deposit
Deposits [Line Items]
Deposits	$ 77,107		76,199
Average balance, deposits	$ 80,904	$ 56,667
Deposits, weighted average interest rate during the period	1.18%	1.00%
Wholesale deposits
Deposits [Line Items]
Deposits	$ 292,553		$ 307,985
Average balance, deposits	$ 300,855	$ 361,712
Deposits, weighted average interest rate during the period	1.77%	1.70%

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- Definition

Average Balance, Deposits

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- Definition

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- Definition

Deposits, Weighted Average Interest Rate During the Period

+ References

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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

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