Consolidated Statements of Comprehensive Income (Unaudited) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Statement of Comprehensive Income [Abstract]    
Net Income $ 38,592 $ 35,980
Other Comprehensive Income (Loss), Net of Tax:    
Net Unrealized Gains (Losses) on Investment Securities 6,271 (9,641)
Defined Benefit Plans 156 78
Total Other Comprehensive Income (Loss) 6,427 (9,563)
Comprehensive Income $ 45,019 $ 26,417