Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest Income:
Mortgage and other loans and leases	$ 391,920	$ 368,264	$ 1,159,344	$ 1,092,637
Securities and money market investments	62,631	56,880	195,133	154,164
Total interest income	454,551	425,144	1,354,477	1,246,801
Interest Expense:
Interest-bearing checking and money market accounts	42,465	44,497	140,396	119,246
Savings accounts	9,326	7,325	26,270	21,176
Certificates of deposit	86,934	51,249	235,360	121,298
Borrowed funds	79,911	72,567	237,521	201,322
Total interest expense	218,636	175,638	639,547	463,042
Net interest income	235,915	249,506	714,930	783,759
Provision for losses on loans	4,781	1,201	5,403	15,486
Net interest income after provision for loan losses	231,134	248,305	709,527	768,273
Non-Interest Income:
Fee income	7,580	7,237	22,295	22,056
Bank-owned life insurance	6,791	7,302	20,245	20,424
Net gain (loss) on securities	275	(41)	7,755	(810)
Other	9,740	8,424	16,473	26,815
Total non-interest income	24,386	22,922	66,768	68,485
Operating expenses:
Compensation and benefits	75,159	78,283	229,172	242,572
Occupancy and equipment	21,748	24,401	66,599	74,311
General and administrative	26,395	31,749	89,350	94,799
Total non-interest expense	123,302	134,433	385,121	411,682
Income before income taxes	132,218	136,794	391,174	425,076
Income tax expense	33,172	30,022	97,305	104,398
Net income	99,046	106,772	293,869	320,678
Preferred stock dividends	8,207	8,207	24,621	24,621
Net income available to common shareholders	$ 90,839	$ 98,565	$ 269,248	$ 296,057
Basic earnings per common share	$ 0.19	$ 0.20	$ 0.57	$ 0.60
Diluted earnings per common share	$ 0.19	$ 0.20	$ 0.57	$ 0.60
Net income	$ 99,046	$ 106,772	$ 293,869	$ 320,678
Other comprehensive income (loss), net of tax:
Change in net unrealized gain (loss) on securities available for sale, net of tax of $666; $8,738; $(22,434) and $40,456, respectively	(757)	(20,790)	58,256	(69,047)
Change in the non-credit portion of OTTI losses recognized in other comprehensive income (loss), net of tax of $0; $0; $0; and ($821), respectively				(821)
Change in pension and post-retirement obligations, net of tax of ($710); ($547); ($2,131) and ($11,611), respectively	1,821	1,314	5,464	(6,029)
Less: Reclassification adjustment for sales of available-for-sale securities, net of tax of $0; $0; $1,527 and $0 respectively			(3,918)
Total other comprehensive income (loss), net of tax	1,064	(19,476)	59,802	(75,897)
Total comprehensive income, net of tax	$ 100,110	$ 87,296	$ 353,671	$ 244,781