Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Measured at Fair Value

The following tables present the Company’s assets and liabilities measured at fair value on a recurring basis, classified by the valuation hierarchy as of March 31, 2018 and December 31, 2017 (dollars in thousands):

	March 31, 2018
	Fair Value Measurements Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Debt Securities:
U.S. Government	$	15,678	$	—	$	15,678	$	—
State and local government	16,552		—		16,552		—
Corporate debt	38,247		—		38,247		—
Asset-backed securities	25,258		—		25,258		—
Mortgage-backed securities	32,761		—		32,761		—
Commercial mortgage-backed securities	3,850		—		3,850		—
Collateralized mortgage obligations	2,365		—		2,365		—
Total debt securities	134,711		—		134,711		—
Equity Securities	5,327		5,082		245		—
Short-term investments	2,505		2,505		—		—
Total marketable investments measured at fair value	$	142,543	$	7,587	$	134,956	$	—
Investments measured at NAV:
Investment in limited partnership	$	4,098
Total investments measured at NAV	$	4,098
Total assets measured at fair value	146,641
Liabilities:
Debt *	$	29,804	$	—	$	—	$	29,804
Total Liabilities measured at fair value	$	29,804	$	—	$	—	$	29,804

* Carried at cost or amortized cost on the consolidated balance sheet

	December 31, 2017
	Fair Value Measurements Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Debt Securities:
U.S. Government	$	17,090	$	—	$	17,090	$	—
State and local government	17,503		—		17,503		—
Corporate debt	38,908		—		38,908		—
Asset-backed securities	23,540		—		23,540		—
Mortgage-backed securities	33,458		—		33,458		—
Commercial mortgage-backed securities	3,491		—		3,491		—
Collateralized mortgage obligations	2,546		—		2,546		—
Total debt securities	136,536		—		136,536		—
Equity Securities	5,627		5,381		246		—
Short-term investments	11,427		8,429		2,998		—
Total assets measured at fair value	$	153,590	$	13,810	$	139,780	$	—
Investments measured at NAV:
Investment in limited partnership	$	4,060
Total investments measured at NAV	$	4,060
Total assets measured at fair value	$	157,650
Liabilities:
Debt *	$	29,888	$	—	$	—	$	29,888
Total Liabilities measured at fair value	$	29,888	$	—	$	—	$	29,888

* Carried at cost or amortized cost on the consolidated balance sheet