Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Investments All Other Investments [Abstract]

The following table summarizes our bond activity for the years ended December 31, 2018 and 2017 (in thousands):

	2018			2017
Fair value at January 1	$	51,101		$	44,573
Purchases		18,426			15,546
Sales		(1,793	)		(940	)
Maturities and calls		(10,445	)		(7,845	)
Decrease in bond premium		(377	)		(160	)
Fair market value adjustment		(356	)		(73	)
Fair value at December 31	$	56,556		$	51,101

Summary of Outstanding Interest Rate Swaps

The following table summarizes our outstanding interest rate swaps and their classification in the accompanying Consolidated Balance Sheets at December 31, 2018 and 2017 (in thousands). Refer to Note 7, Fair Value Measurements, to the accompanying consolidated financial statements for additional disclosures regarding fair value measurements.

	December 31, 2018
	Notional Amount		Fair Value		Balance Sheet Location
Interest rate swaps	$	70,000	$	1,096	Other non-current assets

	December 31, 2017
	Notional Amount		Fair Value		Balance Sheet Location
Interest rate swaps	$	55,000	$	1,055	Other non-current assets
Interest rate swap	$	15,000	$	76	Other current assets

Summary of Effects of Interest Rate Swap

The following table summarizes the effects of the interest rate swap on our accompanying Consolidated Statements of Comprehensive Income for the years ended December 31, 2018 and 2017 (in thousands):

	(Loss) Gain recognized in AOCL, net of tax					Gain (Loss) reclassified from AOCL into expense
	Twelve Months Ended December 31,					Twelve Months Ended December 31,					Location
	2018			2017		2018		2017
Interest rate swap	$	(17	)	$	379	$	357	$	(132	)	Interest expense