v2.4.0.8
Investments - Investments Classified by Contractual Maturity Date (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Amortized Cost    
Due in one year or less $ 885  
Due after one year through five years 107,062  
Due after five years through ten years 23,333  
Due after ten years 14,102  
Mortgage-backed securities 310,907  
Total 456,289 627,462
Estimated Fair Value    
Due in one year or less 892  
Due after one year through five years 107,703  
Due after five years through ten years 23,516  
Due after ten years 13,056  
Mortgage-backed securities 307,879  
Total $ 453,046 $ 640,212