Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at beginning of period	$ 5,954	$ 14,644	$ 6,568	$ 15,174
Cash received from the FDIC, net	(396)	(2,862)	(43)	(3,522)
FDIC reimbursable losses, net	(302)	(944)	(166)	(964)
Amortization, net	(883)	(1,376)	(2,215)	(3,670)
Loan impairment (recapture)	(20)	1	127	1,532
Sale of other real estate	(24)	(208)	120	(627)
Valuation adjustments of other real estate	(40)	52	(22)	1,124
Other	23	(37)	103	(297)
Balance at end of period	4,266	$ 9,344	4,266	$ 9,344
Amount of Estimated Clawback Liability	5,433		5,433
Non-Single Family Covered Assets	93,972		93,972
Single Family Covered Assets	35,075		35,075
Columbia River Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	321		321
Amount of Estimated Clawback Liability	3,451		3,451
Non-Single Family Covered Assets	62,536		62,536
Single Family Covered Assets	6,942		6,942
American Marine Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	2,254		2,254
Amount of Estimated Clawback Liability	1,282		1,282
Non-Single Family Covered Assets	11,148		11,148
Single Family Covered Assets	20,834		20,834
Summit Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	1,371		1,371
Amount of Estimated Clawback Liability	0		0
Non-Single Family Covered Assets	6,889		6,889
Single Family Covered Assets	5,624		5,624
First Heritage Bank [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Balance at end of period	320		320
Amount of Estimated Clawback Liability	700		700
Non-Single Family Covered Assets	13,399		13,399
Single Family Covered Assets	$ 1,675		$ 1,675