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Deposits (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Deposits [Line Items]
Deposits	$ 1,501,706	$ 1,455,299
Average balance, deposits	$ 1,455,705	$ 1,399,840
Deposits, weighted average interest rate during the period	1.59%	1.11%
Non-interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 286,345	$ 280,769
Average balance, deposits	$ 257,222	$ 241,529
Deposits, weighted average interest rate during the period	0.00%	0.00%
Interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 206,360	$ 229,612
Average balance, deposits	$ 215,400	$ 269,943
Deposits, weighted average interest rate during the period	1.62%	0.99%
Money market accounts
Deposits [Line Items]
Deposits	$ 579,539	$ 516,045
Average balance, deposits	$ 555,692	$ 491,756
Deposits, weighted average interest rate during the period	1.82%	1.09%
Certificates of deposit
Deposits [Line Items]
Deposits	$ 167,250	$ 153,022
Average balance, deposits	$ 159,600	$ 94,172
Deposits, weighted average interest rate during the period	2.40%	1.70%
Wholesale deposits
Deposits [Line Items]
Deposits	$ 262,212	$ 275,851
Average balance, deposits	$ 267,791	$ 302,440
Deposits, weighted average interest rate during the period	2.16%	1.95%

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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://fasb.org/us-gaap/role/ref/legacyRef
-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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