Derivatives and Balance Sheet Offsetting (Tables)

3 Months Ended

Mar. 31, 2019

Derivative [Line Items]

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The table below presents the effect of cash flow hedge accounting on Accumulated Other Comprehensive Income at March 31, 2019 and December 31, 2018:

	Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative				Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
	Three Months Ended March 31,					Three Months Ended March 31,
	2019		2018			2019		2018
	(in thousands)
Interest rate collar	$	6,268	$	—	Interest income	$	—	$	—

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table presents the fair value of derivatives, as well as their classification on the Balance Sheet at March 31, 2019 and December 31, 2018:

Asset Derivatives

Liability Derivatives

March 31, 2019

December 31, 2018

March 31, 2019

December 31, 2018

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

Balance Sheet Location

Fair Value

(in thousands)

Derivatives designated as hedging instruments:

Interest rate collar

Other assets

$

6,268

Other assets

$

—

Other liabilities

$

—

Other liabilities

$

—

Derivatives not designated as hedging instruments:

Interest rate swap contracts

Other assets

$

8,815

Other assets

$

7,033

Other liabilities

$

8,815

Other liabilities

$

7,033

Balance Sheet Offsetting [Table Text Block]

The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown.

	Gross Amounts of Recognized Assets/Liabilities		Gross Amounts Offset in the Consolidated Balance Sheets		Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets		Gross Amounts Not Offset in the Consolidated Balance Sheets
							Collateral Posted			Net Amount
March 31, 2019	(in thousands)
Assets
Interest rate swap contracts	$	8,815	$	—	$	8,815	$	—		$	8,815
Interest rate collar	$	6,268	$	—	$	6,268	$	—		6,268
Liabilities
Interest rate swap contracts	$	8,815	$	—	$	8,815	$	(5,573	)	$	3,242
Repurchase agreements	$	23,018	$	—	$	23,018	$	(23,018	)	$	—
December 31, 2018
Assets
Interest rate swap contracts	$	7,033	$	—	$	7,033	$	—		$	7,033
Liabilities
Interest rate swap contracts	$	7,033	$	—	$	7,033	$	(3,235	)	$	3,798
Repurchase agreements	$	61,094	$	—	$	61,094	$	(61,094	)	$	—

Carrying Value of Securities Pledged As Collateral

The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law:

	March 31, 2019
	(in thousands)
Washington and Oregon State to secure public deposits	$	277,815
FRB to secure borrowings	54,717
Other securities pledged	140,755
Total securities pledged as collateral	$	473,287

Available-for-sale Securities [Member]

Derivative [Line Items]

Carrying Value of Securities Pledged As Collateral

The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements:

	Remaining contractual maturity of the agreements
	Overnight and continuous		Up to 30 days		30 - 90 days		Greater than 90 days		Total
March 31, 2019	(in thousands)
Class of collateral pledged for repurchase agreements
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations	$	23,018	$	—	$	—	$	—	$	23,018
Gross amount of recognized liabilities for repurchase agreements									23,018
Amounts related to agreements not included in offsetting disclosure									$	—