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Deposits (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Deposits [Line Items]
Deposits	$ 1,581,588	$ 1,577,231
Average balance, deposits	$ 1,607,886	$ 1,496,982
Deposits, weighted average interest rate during the period	0.76%	0.73%
Non-interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 236,662	$ 231,199
Average balance, deposits	$ 228,294	$ 211,945
Deposits, weighted average interest rate during the period	0.00%	0.00%
Interest-bearing transaction accounts
Deposits [Line Items]
Deposits	$ 154,351	$ 165,921
Average balance, deposits	$ 162,793	$ 125,558
Deposits, weighted average interest rate during the period	0.22%	0.24%
Money market accounts
Deposits [Line Items]
Deposits	$ 646,336	$ 612,642
Average balance, deposits	$ 646,362	$ 602,842
Deposits, weighted average interest rate during the period	0.51%	0.55%
Certificates of deposit
Deposits [Line Items]
Deposits	$ 68,284	$ 79,986
Average balance, deposits	$ 73,163	$ 106,177
Deposits, weighted average interest rate during the period	0.80%	0.78%
Wholesale deposits
Deposits [Line Items]
Deposits	$ 475,955	$ 487,483
Average balance, deposits	$ 497,274	$ 450,460
Deposits, weighted average interest rate during the period	1.60%	1.43%

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- Definition

Average Balance, Deposits

+ References

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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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