INVESTMENT SECURITIES |
3. INVESTMENT SECURITIES
Investment securities classified as current and long-term were as follows at March31, 2010 and December31, 2009, respectively:
Amortized Cost Gross Unrealized Gains Gross Unrealized Losses FairValue
(in thousands)
March31, 2010
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations $ 962,351 $ 8,223 $ (1,943 ) $ 968,631
Mortgage-backed securities 1,851,452 32,783 (9,887 ) 1,874,348
Tax-exempt municipal securities 2,116,790 45,908 (20,462 ) 2,142,236
Mortgage-backed securities:
Residential 83,171 383 (7,163 ) 76,391
Commercial 282,759 7,341 (485 ) 289,615
Asset-backed securities 200,713 1,032 (387 ) 201,358
Corporate debt securities 2,484,253 71,584 (11,924 ) 2,543,913
Redeemable preferred stock 2,000 2,000
Total debt securities $ 7,983,489 $ 167,254 $ (52,251 ) $ 8,098,492
December31, 2009
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations $ 1,005,203 $ 6,683 $ (2,534 ) $ 1,009,352
Mortgage-backed securities 1,675,667 24,324 (11,328 ) 1,688,663
Tax-exempt municipal securities 2,195,077 52,381 (23,417 ) 2,224,041
Mortgage-backed securities:
Residential 106,191 220 (10,999 ) 95,412
Commercial 285,014 3,252 (8,640 ) 279,626
Asset-backed securities 106,471 824 (107 ) 107,188
Corporate debt securities 2,043,721 57,173 (21,326 ) 2,079,568
Redeemable preferred stock 8,400 4,900 13,300
Total debt securities $ 7,425,744 $ 149,757 $ (78,351 ) $ 7,497,150
We participate in a securities lending program where we loan certain investment securities for short periods of time in exchange for collateral, consisting of cash or U.S. Government securities, initially equal to at least 102% of the fair value of the investment securities on loan. Investment securities with a fair value of $66.5 million at March31, 2010 and $126.1 million at December31, 2009 were on loan. At March31, 2010, all collateral from lending our investment securities was in the form of cash which has been reinvested in money market funds, certificates of deposit, and short-term corporate and asset-backed securities.
Gross unrealized losses and fair values aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position were as follows at March31, 2010 and December31, 2009, respectively:
Less than 12 months 12 months or more Total
Fair Value Gross Unrealized Losses Fair Value Gros |