Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Assets Measured at Estimated Fair Value on a Recurring Basis

The following table presents information about the Company’s financial assets measured at estimated fair value on a recurring basis. The table indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value as of June 30, 2016 and December 31, 2015:

	Fair Value Measurements Using
	(Level 1)		(Level 2)		(Level 3)		Total
As of June 30, 2016
Financial Assets:
Cash and cash equivalents	$	309,274	$	—	$	—	$	309,274
Fixed-maturity securities:
U.S. Treasury and U.S. government agencies		1,008		—		—		1,008
Corporate bonds		41,781		984		—		42,765
State, municipalities, and political subdivisions		—		80,132		—		80,132
Exchange-traded debt		11,418		—		—		11,418
Redeemable preferred stock		384		—		—		384
Total fixed-maturity securities		54,591		81,116		—		135,707
Equity securities		49,712		—		—		49,712
Total available-for-sale securities		104,303		81,116		—		185,419
Total	$	413,577	$	81,116	$	—	$	494,693
As of December 31, 2015
Financial Assets:
Cash and cash equivalents	$	267,738	$	—	$	—	$	267,738
Fixed-maturity securities:
U.S. Treasury and U.S. government agencies		113		—		—		113
Corporate bonds		36,836		983		—		37,819
State, municipalities, and political subdivisions		—		77,324		—		77,324
Exchange-traded debt		9,429		—		—		9,429
Redeemable preferred stock		324		—		—		324
Total fixed-maturity securities		46,702		78,307		—		125,009
Equity securities		48,237		—		—		48,237
Total available-for-sale securities		94,939		78,307		—		173,246
Total	$	362,677	$	78,307	$	—	$	440,984

Schedule of Fair Value Information for Financial Assets and Liabilities Carried on Balance Sheet

The following tables present fair value information for assets and liabilities that are carried on the balance sheet at amounts other than fair value as of June 30, 2016 and December 31, 2015.

	Carrying		Fair Value Measurements Using						Estimated
	Value		(Level 1)		(Level 2)		(Level 3)		Fair Value
As of June 30, 2016
Financial Assets:
Limited partnership investments	$	25,269	$	—	$	—	$	25,269	$	25,269
ADC Arrangement classified as real estate investment	$	10,200	$	—	$	—	$	10,187	$	10,187
Financial Liabilities:
Long-term debt:
8% Senior notes	$	39,337	$	—	$	41,818	$	—	$	41,818
3.875% Convertible senior notes		80,368		—		—		83,616		83,616
4% Promissory note		8,418		—		—		9,083		9,083
Total long-term debt	$	128,123	$	—	$	41,818	$	92,699	$	134,517
	Carrying		Fair Value Measurements Using						Estimated
	Value		(Level 1)		(Level 2)		(Level 3)		Fair Value
As of December 31, 2015
Financial Assets:
Limited partnership investments	$	23,930	$	—	$	—	$	23,930	$	23,930
ADC Arrangement classified as real estate investment	$	10,200	$	—	$	—	$	10,140	$	10,140
Financial Liabilities:
Long-term debt:
8% Senior notes	$	39,231	$	—	$	41,103	$	—	$	41,103
3.875% Convertible senior notes		90,198		—		—		92,782		92,782
Total long-term debt	$	129,429	$	—	$	41,103	$	92,782	$	133,885