Comprehensive income (Tables)

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

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

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

	Investment securities					Defined benefit						Total amount				Income
	With OTTI (a)		All other			plans			Other			before tax				tax			Net
	(in thousands)
Balance - January 1, 2016	$	16,359		62,849			(489,660	)		(4,093	)	$	(414,545	)			162,918		$	(251,627	)
Other comprehensive income before reclassifications:
Unrealized holding gains, net		1,228		234,438			—			—			235,666				(92,714	)		142,952
Foreign currency translation adjustment		—		—			—			(2,836	)		(2,836	)			989			(1,847	)
Total other comprehensive income (loss) before     reclassifications		1,228		234,438			—			(2,836	)		232,830				(91,725	)		141,105
Amounts reclassified from accumulated other     comprehensive income that (increase) decrease     net income:
Accretion of unrealized holding losses on     held-to-maturity (“HTM”) securities		—		2,998			—			—			2,998		(b)		(1,180	)		1,818
Gains realized in net income		—		(28,748	)		—			—			(28,748	)	(c)		11,309			(17,439	)
Accretion of net gain on terminated cash flow     hedges		—		—			—			(116	)		(116	)	(d)		46			(70	)
Amortization of prior service credit		—		—			(3,440	)		—			(3,440	)	(e)		1,354			(2,086	)
Amortization of actuarial losses		—		—			22,654			—			22,654		(e)		(8,914	)		13,740
Total reclassifications		—		(25,750	)		19,214			(116	)		(6,652	)			2,615			(4,037	)
Total gain (loss) during the period		1,228		208,688			19,214			(2,952	)		226,178				(89,110	)		137,068
Balance - September 30, 2016	$	17,587		271,537			(470,446	)		(7,045	)	$	(188,367	)			73,808		$	(114,559	)

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		9,699	(11,139	)	—		—			(1,440	)		952			(488	)
Foreign currency translation adjustment		—	—		—		(735	)		(735	)		214			(521	)
Gains on cash flow hedges		—	—		—		1,453			1,453			(568	)		885
Total other comprehensive income before     reclassifications		9,699	(11,139	)	—		718			(722	)		598			(124	)
Amounts reclassified from accumulated other     comprehensive income that (increase) decrease     net income:
Accretion of unrealized holding losses on     HTM securities		—	2,417		—		—			2,417		(b)	(944	)		1,473
Losses realized in net income		—	108		—		—			108		(c)	(40	)		68
Accretion of net gain on terminated cash flow     hedges		—	—		—		(102	)		(102	)	(d)	40			(62	)
Amortization of prior service credit		—	—		(5,523	)	—			(5,523	)	(e)	2,359			(3,164	)
Amortization of actuarial losses		—	—		33,698		—			33,698		(e)	(14,368	)		19,330
Total reclassifications		—	2,525		28,175		(102	)		30,598			(12,953	)		17,645
Total gain (loss) during the period		9,699	(8,614	)	28,175		616			29,876			(12,355	)		17,521
Balance - September 30, 2015	$	17,137	193,214		(474,852	)	(3,466	)	$	(267,967	)		104,494		$	(163,473	)

(a) Other-than-temporary impairment

(b) Included in interest income

(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 the following:

	Investment securities				Defined benefit
	With OTTI		All other		plans			Other			Total
	(in thousands)
Balance - December 31, 2015	$	9,921		38,166		(296,979	)		(2,735	)	$	(251,627	)
Net gain (loss) during period		745		126,586		11,654			(1,917	)		137,068
Balance - September 30, 2016	$	10,666		164,752		(285,325	)		(4,652	)	$	(114,559	)