Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 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 below, 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 March 31, 2016 and December 31, 2015:

	March 31, 2016
amounts in thousands	Level 1		Level 2		Level 3		Total
Fixed maturities:
U.S.  Treasury bonds, agency bonds and    foreign government bonds	$	137,743	$	184,266	$	—	$	322,009
States, municipalities and political subdivisions		—		550,855		—		550,855
Mortgage-backed and asset-backed securities:
Agency mortgage-backed securities		—		380,418		—		380,418
Residential mortgage obligations		—		29,451		—		29,451
Asset-backed securities		—		235,714		—		235,714
Commercial mortgage-backed securities		—		188,169		—		188,169
Subtotal	$	—	$	833,752	$	—	$	833,752
Corporate bonds		—		771,104		—		771,104
Total fixed maturities	$	137,743	$	2,339,977	$	—	$	2,477,720
Equity securities		136,883		177,932		—		314,815
Short-term investments		211,782		—		—		211,782
Total assets measured at fair value	$	486,408	$	2,517,909	$	—	$	3,004,317
Senior notes		—		290,656		—		290,656
Total liabilities measured at fair value	$	—	$	290,656	$	—	$	290,656

	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