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Statements of Cash Flow (Cash Flow Supplemental Disclosures) (Details) - USD ($)
$ in Thousands

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Interest

$ 4,477

$ 3,455

Federal income tax

0

(2,807)

Operating cash flows from operating leases

^[1]

1,983

0

Financing cash flows from finance leases

284

Repayments of capital lease obligations

734

Assets acquired under operating lease arrangements

^[1]

6,136

0

Non-cash purchase of property and equipment

162

0

AFS Fixed Income Securities [Member]

Corporate actions related to securities

^[2]

$ 18,447

$ 11,347

[1]	Upon adoption of ASU 2016-02, effective January 1, 2019, we are required to disclose cash paid for amounts included in the measurement of operating lease liabilities, as well as supplemental non-cash information on operating lease liabilities arising from obtaining operating lease assets.
[2]	Examples of such corporate actions include exchanges, non-cash acquisitions, and stock splits.

X

- Definition

Amount of cash outflow for principal payment on finance lease.

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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