Securities (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value of securities by major security type and class of security:



(Dollars in thousands)
December 31, 2015	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Securities Available for Sale:
Obligations of U.S. government-sponsored enterprises		$77,330		$73		($388	)		$77,015
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	228,908		6,398		(450		)	234,856
Obligations of states and political subdivisions	35,353		727		—			36,080
Individual name issuer trust preferred debt securities	29,815		—		(4,677		)	25,138
Corporate bonds	1,970		5		(20		)	1,955
Total securities available for sale		$373,376		$7,203		($5,535	)		$375,044
Held to Maturity:
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises		$20,023		$493		$—			$20,516
Total securities held to maturity	20,023		493		—			20,516
Total securities		$393,399		$7,696		($5,535	)		$395,560



(Dollars in thousands)
December 31, 2014	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Securities Available for Sale:
Obligations of U.S. government-sponsored enterprises		$31,205		$21		($54	)		$31,172
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	235,343		10,023		—			245,366
Obligations of states and political subdivisions	47,647		1,529		—			49,176
Individual name issuer trust preferred debt securities	30,753		—		(4,979		)	25,774
Corporate bonds	6,120		57		(3		)	6,174
Total securities available for sale		$351,068		$11,630		($5,036	)		$357,662
Held to Maturity:
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises		$25,222		$786		$—			$26,008
Total securities held to maturity	25,222		786		—			26,008
Total securities		$376,290		$12,416		($5,036	)		$383,670

Securities by Contractual Maturity

The schedule of maturities of debt securities available for sale and held to maturity is presented below. Mortgage-backed securities are included based on weighted average maturities, adjusted for anticipated prepayments. All other debt securities are included based on contractual maturities. Actual maturities may differ from amounts presented because certain issuers have the right to call or prepay obligations with or without call or prepayment penalties. Yields on tax exempt obligations are not computed on a tax equivalent basis.



(Dollars in thousands)	December 31, 2015
	Within 1 Year			1-5 Years			5-10 Years			After 10 Years			Totals
Securities Available for Sale:
Obligations of U.S. government-sponsored enterprises:
Amortized cost		$—			$15,100			$62,230			$—			$77,330
Weighted average yield	—		%	1.42		%	2.34		%	—		%	2.16		%
Mortgage-backed securities issued by U.S. government-sponsored enterprises:
Amortized cost	38,526			101,233			60,694			28,455			228,908
Weighted average yield	3.53			3.08			2.63			1.25			2.81
Obligations of states and political subdivisions:
Amortized cost	3,925			22,462			8,966			—			35,353
Weighted average yield	3.86			3.97			4.01			—			3.97
Individual name issuer trust preferred debt securities:
Amortized cost	—			—			—			29,815			29,815
Weighted average yield	—			—			—			1.46			1.46
Corporate bonds:
Amortized cost	—			1,244			726			—			1,970
Weighted average yield	—			2.10			2.88			—			2.39
Total debt securities available for sale:
Amortized cost		$42,451			$140,039			$132,616			$58,270			$373,376
Weighted average yield	3.56		%	3.04		%	2.58		%	1.36		%	2.67		%
Fair value		$43,532			$143,061			$134,119			$54,332			$375,044
Securities Held to Maturity:
Mortgage-backed securities issued by U.S. government-sponsored enterprises:
Amortized cost		$2,576			$7,971			$6,267			$3,209			$20,023
Weighted average yield	3.11		%	3.03		%	2.64		%	0.75		%	2.55		%
Fair value		$2,640			$8,167			$6,421			$3,288			$20,516

Included in the above table were debt securities with an amortized cost balance of $139.1 million and a fair value of $134.7 million at December 31, 2015 that are callable at the discretion of the issuers. Final maturities of the callable securities range from 2 months to 21 years, with call features ranging from 1 month to 6 years.

Securities in a Continuous Unrealized Loss Position

The following tables summarize temporarily impaired securities, segregated by length of time the securities have been in a continuous unrealized loss position:



(Dollars in thousands)	Less than 12 Months						12 Months or Longer						Total
December 31, 2015	#	Fair Value		Unrealized Losses			#	Fair Value		Unrealized Losses			#	Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored enterprises	4		$34,767		($388	)	—		$—		$—		4		$34,767		($388	)
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	9	61,764		(450		)	—	—		—			9	61,764		(450		)
Individual name issuer trust preferred debt securities	—	—		—			10	25,138		(4,677		)	10	25,138		(4,677		)
Corporate bonds	3	1,235		(20		)	—	—		—			3	1,235		(20		)
Total temporarily impaired securities	16		$97,766		($858	)	10		$25,138		($4,677	)	26		$122,904		($5,535	)



(Dollars in thousands)	Less than 12 Months						12 Months or Longer						Total
December 31, 2014	#	Fair Value		Unrealized Losses			#	Fair Value		Unrealized Losses			#	Fair Value		Unrealized Losses
Obligations of U.S. government-sponsored enterprises	3		$20,952		($54	)	—		$—		$—		3		$20,952		($54	)
Individual name issuer trust preferred debt securities	—	—		—			11	25,774		(4,979		)	11	25,774		(4,979		)
Corporate bonds	—	—		—			1	199		(3		)	1	199		(3		)
Total temporarily impaired securities	3		$20,952		($54	)	12		$25,973		($4,982	)	15		$46,925		($5,036	)

Rollforward of cumulative credit-related impairment losses on debt securities

Credit-Related Impairment Losses Recognized on Debt Securities

As of December 31, 2015 and December 31, 2014, Washington Trust no longer had investments in two pooled trust preferred holdings in the form of collateralized debt obligations (“CDO”). During 2013, other-than-temporary impairment (“OTTI”) losses were recognized in earnings on these two pooled trust preferred debt securities.

On March 22, 2013, the trustee for one of the pooled trust preferred securities issued a notice that liquidation of the CDO entity would take place at the direction of holders of the CDO tranches senior to the subordinate tranche interest held by Washington Trust. Accordingly, we recognized an other-than-temporary impairment charge in the first quarter of 2013 on the entire $2.8 million carrying value of the security, based on the expectation that proceeds from liquidation would be insufficient to satisfy the amount owed to the subordinate tranche. The liquidation was conducted in August 2013 and was insufficient to satisfy any amount owed to the subordinate tranche.

In December 2013, Washington Trust changed its intent to hold its other CDO investment until recovery of its cost basis and subsequently sold this security in January 2014. As a result, Washington Trust recognized an other-than-temporary impairment loss of $717 thousand on this CDO in December 2013. The amortized cost and fair value of this CDO amounted to $547 thousand at December 31, 2013, which equaled the January 2014 sales price.

The following table presents a rollforward of the cumulative credit-related impairment losses on debt securities:



(Dollars in thousands)
Years ended December 31,	2015		2014		2013
Balance at beginning of period		$—		$—		$3,325
Credit-related impairment loss on debt securities for which an other-than-temporary impairment was not previously recognized	—		—		—
Additional increases to the amount of credit-related impairment loss on debt securities for which an other-than-temporary impairment was previously recognized	—		—		3,489
Reductions for securities for which a liquidation notice was received during the period	—		—		(4,868		)
Reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the entity intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost	—		—		(1,946		)
Balance at end of period		$—		$—		$—