|
Investment Securities (Amort cost, gross unrealized gains/losses, and fair value) (Details) (USD $)
In Thousands, unless otherwise specified
|
Mar. 31, 2014
|
Dec. 31, 2013
|
| Available-for-Sale: |
|
|
| Amortized Cost |
$ 2,179,529 |
$ 2,245,857 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
33,756 |
31,420 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
(25,221) |
(33,580) |
| Fair Value |
2,188,064 |
2,243,697 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
4,777,494 |
4,744,519 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
51,792 |
37,071 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
(55,254) |
(84,003) |
| Held-to-Maturity, Fair Value (in dollars) |
4,774,032 |
4,697,587 |
|
Debt Securities Issued by United States Treasury and Government Agencies
|
|
|
| Available-for-Sale: |
|
|
| Amortized Cost |
368,033 |
390,873 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
6,079 |
6,640 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
(133) |
(234) |
| Fair Value |
373,979 |
397,279 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
498,540 |
433,987 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
2,776 |
3,045 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
(3,463) |
(3,667) |
| Held-to-Maturity, Fair Value (in dollars) |
497,853 |
433,365 |
|
Debt Securities Issued by States and Political Subdivisions
|
|
|
| Available-for-Sale: |
|
|
| Amortized Cost |
718,801 |
691,861 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
11,457 |
8,396 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
(7,139) |
(13,455) |
| Fair Value |
723,119 |
686,802 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
252,179 |
253,039 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
6,507 |
817 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
0 |
(133) |
| Held-to-Maturity, Fair Value (in dollars) |
258,686 |
253,723 |
|
Debt Securities Issued by Corporations
|
|
|
| Available-for-Sale: |
|
|
| Amortized Cost |
265,040 |
280,172 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
1,103 |
1,165 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
(6,582) |
(7,836) |
| Fair Value |
259,561 |
273,501 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
178,032 |
190,181 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
5 |
0 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
(4,631) |
(5,708) |
| Held-to-Maturity, Fair Value (in dollars) |
173,406 |
184,473 |
|
Mortgage-Backed Securities
|
|
|
| Available-for-Sale: |
|
|
| Amortized Cost |
827,655 |
882,951 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
15,117 |
15,219 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
(11,367) |
(12,055) |
| Fair Value |
831,405 |
886,115 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
3,848,743 |
3,867,312 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
42,504 |
33,209 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
(47,160) |
(74,495) |
| Held-to-Maturity, Fair Value (in dollars) |
3,844,087 |
3,826,026 |
|
Residential - Government Agencies
|
|
|
| Available-for-Sale: |
|
|
| Amortized Cost |
592,588 |
641,227 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
13,743 |
13,816 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
(1,348) |
(1,849) |
| Fair Value |
604,983 |
653,194 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
3,408,764 |
3,523,343 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
41,169 |
31,786 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
(39,502) |
(66,572) |
| Held-to-Maturity, Fair Value (in dollars) |
3,410,431 |
3,488,557 |
|
Residential - U.S. Government-Sponsored Enterprises
|
|
|
| Available-for-Sale: |
|
|
| Amortized Cost |
20,034 |
21,865 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
1,374 |
1,403 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
0 |
0 |
| Fair Value |
21,408 |
23,268 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
118,555 |
21,602 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
1,335 |
1,423 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
(508) |
0 |
| Held-to-Maturity, Fair Value (in dollars) |
119,382 |
23,025 |
|
Commercial Mortgage-Backed Securities Issued by Government Agencies
|
|
|
| Available-for-Sale: |
|
|
| Amortized Cost |
215,033 |
219,859 |
| Available For Sale Securities Gross Unrealized Gain Accumulated In Investments |
0 |
0 |
| Available For Sale Securities Gross Unrealized Loss Accumulated In Investments |
(10,019) |
(10,206) |
| Fair Value |
205,014 |
209,653 |
| Held-to-Maturity: |
|
|
| Amortized Cost |
321,424 |
322,367 |
| Held To Maturity Securities Accumulated Unrecognized Holding Gain |
0 |
0 |
| Held To Maturity Securities Accumulated Unrecognized Holding Loss |
(7,150) |
(7,923) |
| Held-to-Maturity, Fair Value (in dollars) |
$ 314,274 |
$ 314,444 |