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Deposits (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Deposits [Line Items]
Deposits	$ 1,423,724	$ 1,538,855
Average balance, deposits	$ 1,481,183	$ 1,591,971
Deposits, weighted average interest rate during the period	0.72%	0.74%
Non-interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 253,320	$ 252,638
Average balance, deposits	$ 228,231	$ 246,182
Deposits, weighted average interest rate during the period	0.00%	0.00%
Interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 251,355	$ 183,992
Average balance, deposits	$ 221,526	$ 169,571
Deposits, weighted average interest rate during the period	0.53%	0.27%
Money market accounts
Deposits [Line Items]
Deposits	$ 527,705	$ 627,090
Average balance, deposits	$ 601,455	$ 642,784
Deposits, weighted average interest rate during the period	0.45%	0.48%
Certificates of deposit
Deposits [Line Items]
Deposits	$ 58,144	$ 58,454
Average balance, deposits	$ 55,888	$ 65,608
Deposits, weighted average interest rate during the period	0.98%	0.90%
Wholesale deposits
Deposits [Line Items]
Deposits	$ 333,200	$ 416,681
Average balance, deposits	$ 374,083	$ 467,826
Deposits, weighted average interest rate during the period	1.68%	1.62%

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- Definition

Average Balance, Deposits

+ References

No definition available.

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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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