Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at beginning of period	$ 3,535	$ 6,568
Cash paid to the FDIC, net	184	353
FDIC reimbursable losses, net	(206)	136
Amortization, net	(315)	(1,332)
Loan impairment	40	147
Sale of other real estate	7	144
Valuation adjustments of other real estate owned	0	18
Other	6	80
Balance at end of period	3,239	$ 5,954
Amount of Estimated Clawback Liability	5,380
Non-Single Family Covered Assets	73,991
Single Family Covered Assets	26,445
Columbia River Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	158
Amount of Estimated Clawback Liability	3,362
Non-Single Family Covered Assets	50,590
Single Family Covered Assets	5,721
American Marine Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,676
Amount of Estimated Clawback Liability	1,275
Non-Single Family Covered Assets	8,885
Single Family Covered Assets	15,319
Summit Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,313
Amount of Estimated Clawback Liability	0
Non-Single Family Covered Assets	4,788
Single Family Covered Assets	4,182
First Heritage Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	92
Amount of Estimated Clawback Liability	743
Non-Single Family Covered Assets	9,728
Single Family Covered Assets	$ 1,223