Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Fixed Maturities and Equity Securities by Asset Class that are Measured at Fair Value

The following tables present, for each of the fair value hierarchy levels as defined by the accounting guidance for fair value measurements and described above, our Company’s Fixed maturities and Equity securities by asset class that are measured at fair value on a recurring basis, as well as the fair value of the 5.75% Senior notes due October 15, 2023 (the “Senior notes”) carried at amortized cost as of June 30, 2016 and December 31, 2015:

	June 30, 2016
amounts in thousands	Level 1		Level 2		Level 3		Total
Fixed maturities:
U.S.  Treasury bonds, agency bonds and    foreign government bonds	$	136,923	$	216,656	$	—	$	353,579
States, municipalities and political subdivisions		—		553,824		—		553,824
Mortgage-backed and asset-backed securities:
Agency mortgage-backed securities		—		504,731		—		504,731
Residential mortgage obligations		—		28,258		—		28,258
Asset-backed securities		—		262,903		—		262,903
Commercial mortgage-backed securities		—		172,579		—		172,579
Subtotal	$	—	$	968,471	$	—	$	968,471
Corporate bonds		—		756,439		—		756,439
Total fixed maturities	$	136,923	$	2,495,390	$	—	$	2,632,313
Equity securities		154,551		175,084		—		329,635
Short-term investments		144,843		—		—		144,843
Total assets measured at fair value	$	436,317	$	2,670,474	$	—	$	3,106,791
Senior notes	$	—	$	288,738	$	—	$	288,738
Total liabilities measured at fair value	$	—	$	288,738	$	—	$	288,738

	December 31, 2015
amounts in thousands	Level 1		Level 2		Level 3		Total
Fixed maturities:
U.S. Treasury bonds, agency bonds and    foreign government bonds	$	67,394	$	185,488	$	—	$	252,882
States, municipalities and political subdivisions		—		576,859		—		576,859
Mortgage-backed and asset-backed securities:
Agency mortgage-backed securities		—		379,269		—		379,269
Residential mortgage obligations		—		30,465		—		30,465
Asset-backed securities		—		225,012		—		225,012
Commercial mortgage-backed securities		—		189,713		—		189,713
Subtotal	$	—	$	824,459	$	—	$	824,459
Corporate bonds		—		760,010		—		760,010
Total fixed maturities	$	67,394	$	2,346,816	$	—	$	2,414,210
Equity securities		126,455		178,816		—		305,271
Short-term investments		217,745		—		—		217,745
Total assets measured at fair value	$	411,594	$	2,525,632	$	—	$	2,937,226
Senior notes	$	—	$	282,486	$	—	$	282,486
Total liabilities measured at fair value	$	—	$	282,486	$	—	$	282,486