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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Cash Flows [Abstract]    
Net cash provided by (used in) operating activities $ 11,482 $ 75,085
Cash flows from investing activities    
Sales, maturities and repayments of fixed maturity securities 171,018 36,199
Sales, maturities and repayments of mortgage loans 8,449 14,157
Purchases of fixed maturity securities (146,636) (57,864)
Purchases of mortgage loans (8,477) (15,851)
Net change in short-term investments (2,003) 998
Net change in other invested assets 0 (11)
Net cash provided by (used in) investing activities 22,351 (22,372)
Cash flows from financing activities    
Policyholder account balances: Deposits 15,044 10,012
Policyholder account balances: Withdrawals (36,734) (57,410)
Net change in payables for collateral under derivative transactions (200) 2,100
Net cash provided by (used in) financing activities (21,890) (45,298)
Change in cash and cash equivalents 11,943 7,415
Cash and cash equivalents, beginning of period 18,583 9,310
Cash and cash equivalents, end of period 30,526 16,725
Supplemental disclosures of cash flow information    
Net cash paid (received) for Income tax $ 3 $ 0