Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Schedule of Estimated Fair Values of Financial Instruments

The estimated fair values of financial instruments are as follows (in thousands):

	September 30, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial liabilities:
Notes payable	$	161,011	$	161,011	$	155,768	$	155,768
Subordinated amortizing notes	1,619		1,700		7,225		7,478
5 3/4% Senior Notes due 2019	149,226		151,875		148,826		151,125
8 1/2% Senior Notes due 2020	—		—		422,817		444,125
7% Senior Notes due 2022	346,556		362,250		346,014		363,125
5 7/8% Senior Notes due 2025	439,221		462,375		—		—