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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash flows - operating activities    
Premiums collected $ 557,816 $ 538,633
Policyholder benefits paid (422,184) (399,465)
Policy acquisition and other operating expenses paid (207,825) (196,209)
Federal income taxes paid (18,156) (20,327)
Investment income collected 259,373 246,042
Interest expense paid (6,072) (7,316)
Other (1,437) (1,881)
Net cash provided by operating activities 161,515 159,477
Fixed maturities    
Purchases (1,097,880) (1,111,958)
Sales 351,739 327,641
Maturities, paydowns, calls and redemptions 634,686 502,554
Purchase of other invested assets (42,578) (19,037)
Net cash provided by (used in) short-term and other investments (75,665) 56,831
Net cash used in investing activities (229,698) (243,969)
Cash flows - financing activities    
Dividends paid to shareholders (33,241) (31,975)
Principal borrowings on Bank Credit Facility 0 75,000
Maturity of Senior Notes due 2015 0 (75,000)
Acquisition of treasury stock (21,513) (15,775)
Exercise of stock options 2,361 1,518
Annuity contracts: variable, fixed and FHLB funding agreements    
Deposits 391,944 422,195
Benefits, withdrawals and net transfers to Separate Account (variable annuity) assets (240,489) (258,076)
Life policy accounts    
Deposits 2,957 742
Withdrawals and surrenders (3,151) (3,050)
Change in bank overdrafts 7,422 7,153
Net cash provided by financing activities 106,290 122,732
Net increase in cash 38,107 38,240
Cash at beginning of period 15,509 11,675
Cash at end of period $ 53,616 $ 49,915