Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at beginning of period	$ 4,266	$ 9,344	$ 6,568	$ 15,174
Cash (received from) paid to the FDIC, net	20	799	(23)	(2,723)
FDIC reimbursable losses, net	(590)	(362)	(756)	(1,326)
Amortization, net	(315)	(1,416)	(2,530)	(5,086)
Loan impairment (recapture)	266	(119)	393	1,413
Sale of other real estate	(49)	(126)	71	(753)
Valuation adjustments of other real estate owned	0	25	(22)	1,148
Other	6	(1)	109	(299)
Balance at end of period	3,592	$ 8,146	3,592	$ 8,146
Amount of Estimated Clawback Liability	5,462		5,462
Non-Single Family Covered Assets	89,251		89,251
Single Family Covered Assets	31,395		31,395
Columbia River Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	349		349
Amount of Estimated Clawback Liability	3,474		3,474
Non-Single Family Covered Assets	61,040		61,040
Single Family Covered Assets	6,110		6,110
American Marine Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,959		1,959
Amount of Estimated Clawback Liability	1,280		1,280
Non-Single Family Covered Assets	9,366		9,366
Single Family Covered Assets	18,563		18,563
Summit Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,577		1,577
Amount of Estimated Clawback Liability	0		0
Non-Single Family Covered Assets	6,700		6,700
Single Family Covered Assets	5,077		5,077
First Heritage Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	(293)		(293)
Amount of Estimated Clawback Liability	708		708
Non-Single Family Covered Assets	12,145		12,145
Single Family Covered Assets	$ 1,645		$ 1,645