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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows - operating activities    
Premiums collected $ 367,182 $ 352,825
Policyholder benefits paid (268,212) (257,606)
Policy acquisition and other operating expenses paid (138,612) (138,303)
Federal income taxes paid (15,094) (18,143)
Investment income collected 175,541 167,738
Interest expense paid (5,989) (6,837)
Other (2,279) (1,364)
Net cash provided by operating activities 112,537 98,310
Fixed maturities    
Purchases (834,114) (707,886)
Sales 257,033 246,521
Maturities, paydowns, calls and redemptions 475,532 287,764
Purchase of other invested assets (33,809) (15,809)
Net cash provided by short-term and other investments 7,925 35,010
Net cash used in investing activities (127,433) (154,400)
Cash flows - financing activities    
Dividends paid to shareholders (22,174) (21,371)
Principal borrowings on Bank Credit Facility 0 75,000
Maturity of Senior Notes due 2015 0 (75,000)
Acquisition of treasury stock (21,513) (716)
Exercise of stock options 1,926 1,557
Annuity contracts: variable, fixed and FHLB funding agreements    
Deposits 237,265 282,897
Benefits, withdrawals and net transfers to Separate Account (variable annuity) assets (162,575) (178,557)
Life policy accounts    
Deposits 1,680 435
Withdrawals and surrenders (1,995) (1,995)
Change in bank overdrafts 17,205 8,178
Net cash provided by financing activities 49,819 90,428
Net increase in cash 34,923 34,338
Cash at beginning of period 15,509 11,675
Cash at end of period $ 50,432 $ 46,013