Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments And Contingencies Disclosure [Abstract]

Company's Significant Commitments

The following table presents the Company’s significant commitments. Certain of these commitments are not included in the Company’s consolidated balance sheet.

	December 31
	2016		2015
	(In thousands)
Commitments to extend credit
Home equity lines of credit	$	5,499,609	$	5,631,680
Commercial real estate loans to be sold		70,100	57,597
Other commercial real estate		6,451,709		5,949,933
Residential real estate loans to be sold		478,950		488,621
Other residential real estate		232,721		212,619
Commercial and other		12,298,473		11,802,850
Standby letters of credit		2,987,091		3,330,013
Commercial letters of credit		44,723		55,559
Financial guarantees and indemnification contracts		3,043,580		2,794,322
Commitments to sell real estate loans		1,489,237		782,885

Minimum Lease Payments Under Noncancelable Operating Leases

Minimum lease payments under noncancelable operating leases are summarized in the following table:

	(In thousands)
Year ending December 31:
2017	$	99,847
2018		94,448
2019		74,814
2020		58,216
2021		44,508
Later years		94,825
	$	466,658