Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Asset and liability management) (Details Add Info)

v2.4.0.8
Derivative Financial Instruments (Asset and liability management) (Details Add Info) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Y
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Amount Of Interest Rate Derivatives $ 8,511,500
Average Maturity (years) 3.0
Fair Value 54,658
Weighted-Average Rate Receive 1.18%
Weighted-Average Rate Pay 0.38%
Asset conversion swaps - Receive Fixed - Generic [Member]
  
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Amount Of Interest Rate Derivatives 7,366,000
Average Maturity (years) 2.9
Fair Value (16,753)
Weighted-Average Rate Receive 0.91%
Weighted-Average Rate Pay 0.38%
Asset Conversion Swaps Pay Fixed Generic [Member]
  
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Amount Of Interest Rate Derivatives 0
Average Maturity (years) 0.0
Fair Value 0
Weighted-Average Rate Receive 0.00%
Weighted-Average Rate Pay 0.00%
Liability conversion swaps - Receive Fixed - Generic [Member]
  
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Amount Of Interest Rate Derivatives 1,145,500
Average Maturity (years) 3.8
Fair Value 71,411
Weighted-Average Rate Receive 2.94%
Weighted-Average Rate Pay 0.35%
Liability Conversion Swaps - Receive Fixed - Callable
  
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Amount Of Interest Rate Derivatives 0
Average Maturity (years) 0.0
Fair Value $ 0
Weighted-Average Rate Receive 0.00%
Weighted-Average Rate Pay 0.00%