Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]	0000011544 (http://www.sec.gov/CIK)
Long-term Debt, Type [Axis]	Senior Notes and Other Debt

Debt Instrument [Line Items]	Period [Axis]
	2015-01-01 - 2015-12-31
Schedule of Debt	Indebtedness consisted of the following as of December 31, 2016 (the difference between the face value and the carrying value is unamortized discount and debt issuance costs): (In thousands) Interest Rate   Face Value   2016 Carrying Value   2015 Carrying Value Senior notes due on:               August 15, 2019 6.15%   $ 140,651   $ 140,301   $ 149,484 September 15, 2019 7.375%   300,000   299,308   299,054 September 15, 2020 5.375%   300,000   298,747   298,411 January 1, 2022 8.7%   76,503   76,151   76,097 March 15, 2022 4.625%   350,000   347,834   347,417 February 15, 2037 6.25%   250,000   247,786   247,676 August 1, 2044 4.75%   350,000   344,914   344,730 Subsidiary debt (1) Various   5,554   5,554   81,752   Total senior notes and other debt     $ 1,772,708   $ 1,760,595   $ 1,844,621 Subordinated debentures due on:               April 30, 2053 5.625%   $ 350,000   $ 340,579   $ 340,320 March 1, 2056 5.9%   110,000   105,952   — June 1, 2056 5.75%   290,000   281,099   — Total subordinated debentures   $ 750,000   $ 727,630   $ 340,320 ________________ (1) Subsidiary debt is due as follows: $4 million in 2017