Debt (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Schedule of Senior Notes

Our senior notes are summarized as follows ($000’s omitted):

	September 30, 2015		December 31, 2014
5.25% unsecured senior notes due June 2015 (a)	$	—	$	236,452
6.50% unsecured senior notes due May 2016 (a)	463,829		462,009
7.625% unsecured senior notes due October 2017 (b)	122,819		122,752
7.875% unsecured senior notes due June 2032 (a)	299,272		299,239
6.375% unsecured senior notes due May 2033 (a)	398,696		398,640
6.00% unsecured senior notes due February 2035 (a)	299,488		299,469
Total senior notes – carrying value (c)	$	1,584,104	$	1,818,561
Estimated fair value	$	1,662,206	$	1,952,774

(a) Redeemable prior to maturity; guaranteed on a senior basis by certain wholly-owned subsidiaries.

(b) Not redeemable prior to maturity; guaranteed on a senior basis by certain wholly-owned subsidiaries.

(c) The recorded carrying value reflects the impact of various discounts and premiums that are amortized to interest cost over the respective terms of the senior notes