Consolidated Statements of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Securities available-for-sale, pledged	$ 10,934		$ 11,436
Securities held to maturity, pledged	4,528,139		4,584,886
Securities held to maturity, fair value	7,028,201	[1]	7,085,971	[2]
Other real estate owned, covered by loss sharing agreements	31,015		32,048
Preferred stock, par	$ 0.01		$ 0.01
Preferred stock, shares authorized	5,000,000		5,000,000
Preferred stock, issued	0		0
Common stock, par	$ 0.01		$ 0.01
Common stock, shares authorized	600,000,000		600,000,000
Common stock, shares issued	444,278,206		442,659,460
Common stock, shares outstanding	444,277,802		442,587,190
Treasury stock, shares	404		72,270
Net unrealized gain on securities available for sale, tax	3,183		2,022
Net unrealized loss on the non-credit portion of other-than-temporary impairment losses on securities, tax	3,433		3,444
Net unrealized loss on pension and post-retirement obligations, tax	$ 35,274		$ 36,118

[1] Held-to-maturity securities are reported at a carrying amount equal to amortized cost less the non-credit portion of OTTI recorded in AOCL. At March 31, 2015, the non-credit portion of OTTI recorded in AOCL was $8.8 million (before tax).

[2] Held-to-maturity securities are reported at a carrying amount equal to amortized cost less the non-credit portion of OTTI recorded in AOCL. At December 31, 2014, the non-credit portion of OTTI recorded in AOCL was $8.8 million (before taxes).