Comprehensive income (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Components of Other Comprehensive Income (Loss) and Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income.

	Investment Securities					Defined Benefit Plans			Other			Total Amount Before Tax			Income Tax			Net
	With      OTTI		All      Other
	(In thousands)
Balance — January 1, 2015	$	7,438		201,828			(503,027	)		(4,082	)		(297,843	)		116,849		$	(180,994	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net		8,921		(142,623	)		—			—			(133,702	)		52,376			(81,326	)
Foreign currency translation adjustment		—		—			—			(1,323	)		(1,323	)		398			(925	)
Gains on cash flow hedges		—		—			—			1,453			1,453			(572	)		881
Current year benefit plans losses		—		—			(24,200	)		—			(24,200	)		8,612			(15,588	)
Total other comprehensive income (loss) before reclassifications		8,921		(142,623	)		(24,200	)		130			(157,772	)		60,814			(96,958	)
Amounts reclassified from accumulated other comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on held-to-maturity (“HTM”) securities		—		3,514			—			—			3,514	(a)		(1,383	)		2,131
Losses realized in net income		—		130			—			—			130	(c)		(49	)		81
Accretion of net gain on terminated cash flow hedges		—		—			—			(141	)		(141	)(d)		56			(85	)
Amortization of prior service credit		—		—			(7,364	)		—			(7,364	)(e)		2,620			(4,744	)
Amortization of actuarial losses		—		—			44,931			—			44,931	(e)		(15,989	)		28,942
Total reclassifications		—		3,644			37,567			(141	)		41,070			(14,745	)		26,325
Total gain (loss) during the period		8,921		(138,979	)		13,367			(11	)		(116,702	)		46,069			(70,633	)
Balance — December 31, 2015	$	16,359		62,849			(489,660	)		(4,093	)		(414,545	)		162,918		$	(251,627	)

	Investment Securities					Defined Benefit Plans			Other			Total Amount Before Tax			Income Tax			Net
	With      OTTI			All      Other
	(In thousands)
Balance — January 1, 2014	$	37,255			18,450		(161,617	)		115			(105,797	)		41,638		$	(64,159	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net		(29,818	)		180,005		—			—			150,187			(58,962	)		91,225
Foreign currency translation adjustment		—			—		—			(4,039	)		(4,039	)		1,432			(2,607	)
Unrealized losses on cash flow hedges		—			—		—			(165	)		(165	)		65			(100	)
Current year benefit plans losses		—			—		(347,993	)		—			(347,993	)		136,587			(211,406	)
Total other comprehensive income (loss) before reclassifications		(29,818	)		180,005		(347,993	)		(4,204	)		(202,010	)		79,122			(122,888	)
Amounts reclassified from accumulated other comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on HTM securities		1			3,373		—			—			3,374	(a)		(1,324	)		2,050
Amortization of losses on terminated cash flow hedges		—			—		—			7			7	(d)		(3	)		4
Amortization of prior service credit		—			—		(7,911	)		—			(7,911	)(e)		3,105			(4,806	)
Amortization of actuarial losses		—			—		14,494			—			14,494	(e)		(5,689	)		8,805
Total reclassifications		1			3,373		6,583			7			9,964			(3,911	)		6,053
Total gain (loss) during the period		(29,817	)		183,378		(341,410	)		(4,197	)		(192,046	)		75,211			(116,835	)
Balance — December 31, 2014	$	7,438			201,828		(503,027	)		(4,082	)		(297,843	)		116,849		$	(180,994	)

	Investment Securities						Defined Benefit Plans			Other			Total Amount Before Tax			Income Tax			Net
	With OTTI			All Other
	(In thousands)
Balance — January 1, 2013	$	(91,835	)		152,199			(455,590	)		(431	)		(395,657	)		155,393		$	(240,264	)
Other comprehensive income before reclassifications:
Unrealized holding gains (losses), net		77,794			(129,628	)		—			—			(51,834	)		20,311			(31,523	)
Foreign currency translation adjustment		—			—			—			546			546			(165	)		381
Current year benefit plans gains		—			—			260,452			—			260,452			(102,227	)		158,225
Total other comprehensive income (loss) before reclassifications		77,794			(129,628	)		260,452			546			209,164			(82,081	)		127,083
Amounts reclassified from accumulated other comprehensive income that (increase) decrease net income:
Amortization of unrealized holding losses on HTM securities		279			4,008			—			—			4,287	(a)		(1,683	)		2,604
OTTI charges recognized in net income		9,800			—			—			—			9,800	(b)		(3,847	)		5,953
Losses (gains) realized in net income		41,217			(8,129	)		—			—			33,088	(c)		(12,987	)		20,101
Amortization of prior service credit		—			—			(7,915	)		—			(7,915	)(e)		3,107			(4,808	)
Amortization of actuarial losses		—			—			41,436			—			41,436	(e)		(16,264	)		25,172
Total reclassifications		51,296			(4,121	)		33,521			—			80,696			(31,674	)		49,022
Total gain (loss) during the period		129,090			(133,749	)		293,973			546			289,860			(113,755	)		176,105
Balance — December 31, 2013	$	37,255			18,450			(161,617	)		115			(105,797	)		41,638		$	(64,159	)

(a) Included in interest income.

(b) Included in OTTI losses recognized in earnings.

(c) Included in gain (loss) on bank investment securities.

(d) Included in interest expense.

(e) Included in salaries and employee benefits expense.

Accumulated Other Comprehensive Income (Loss), Net

Accumulated other comprehensive income (loss), net consisted of unrealized gains (losses) as follows:

	Investment Securities						Defined Benefit Plans			Other			Total
	With OTTI			All Other
							(In thousands)
Balance at January 1, 2013	$	(55,790	)	$	92,581		$	(276,771	)	$	(284	)	$	(240,264	)
Net gain (loss) during 2013		78,422			(81,287	)		178,589			381			176,105
Balance at December 31, 2013		22,632			11,294			(98,182	)		97			(64,159	)
Net gain (loss) during 2014		(18,114	)		111,389			(207,407	)		(2,703	)		(116,835	)
Balance at December 31, 2014		4,518			122,683			(305,589	)		(2,606	)		(180,994	)
Net gain (loss) during 2015		5,403			(84,517	)		8,610			(129	)		(70,633	)
Balance at December 31, 2015	$	9,921		$	38,166		$	(296,979	)	$	(2,735	)	$	(251,627	)