XML 39 R28.htm IDEA: XBRL DOCUMENT v3.5.0.2
Investments - Carrying value and estimated fair value (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Debt securities:    
Amortized Cost $ 487,631  
Equity securities:    
Amortized Cost 487,631 $ 470,080
Gross Unrealized Gains 23,346 9,406
Gross Unrealized Losses (576) (1,932)
Available-for-sale investment securities 510,401 477,554
Held-to-maturity Securities, Debt Maturities [Abstract]    
Amortized Cost Basis 0 31,712
Estimated Fair Value   35,142
U.S. Government agencies    
Debt securities:    
Amortized Cost 57,408 52,803
Gross Unrealized Gains 574 315
Gross Unrealized Losses (141) (217)
Estimated Fair Value 57,841 52,901
Obligations of states and political subdivisions    
Debt securities:    
Amortized Cost 212,563 181,785
Gross Unrealized Gains 17,810 6,779
Gross Unrealized Losses (38) (296)
Estimated Fair Value 230,335 188,268
Held-to-maturity Securities, Debt Maturities [Abstract]    
Amortized Cost Basis   31,712
Gross Unrealized Gains   3,431
Gross Unrealized Losses   (1)
Estimated Fair Value   35,142
U.S. Government agencies collateralized by residential mortgage obligations    
Debt securities:    
Amortized Cost 208,082 225,636
Gross Unrealized Gains 3,682 1,042
Gross Unrealized Losses (397) (1,419)
Estimated Fair Value 211,367 225,259
Private label residential mortgage backed securities    
Debt securities:    
Amortized Cost 2,078 2,356
Gross Unrealized Gains 1,076 1,234
Gross Unrealized Losses 0 0
Estimated Fair Value 3,154 3,590
Other equity securities    
Equity securities:    
Amortized Cost 7,500 7,500
Gross Unrealized Gains 204 36
Gross Unrealized Losses 0 0
Estimated Fair Value $ 7,704 $ 7,536