Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Investments All Other Investments [Abstract]

Summary of Bond Activity

The following table summarizes our bond activity for the years ended December 31, 2016 and 2015 (in thousands):

	2016			2015
Fair value at January 1	$	43,142		$	38,399
Purchases		11,355			15,429
Sales		(2,900	)		(987	)
Maturities and calls		(6,878	)		(9,677	)
Decrease (increase) in bond premium		(106	)		172
Fair market value adjustment		(40	)		(194	)
Fair value at December 31	$	44,573		$	43,142

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, 2016 and 2015 (in thousands). Refer to Note 6, Fair Value Measurements, to the accompanying consolidated financial statements for additional disclosures regarding fair value measurements.

	December 31, 2016
	Notional Amount		Fair Value		Balance Sheet Location
Interest rate swaps	$	50,000	$	525	Other non-current assets
Interest rate swaps	$	10,000	$	4	Other current assets
	December 31, 2015
	Notional Amount		Fair Value		Balance Sheet Location
Interest rate swap	$	50,000	$	240	Other non-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, 2016 and 2015 (in thousands):

	Gain recognized in AOCL, net of tax				Loss reclassified from AOCL into expense
	Twelve Months Ended December 31,				Twelve Months Ended December 31,						Location
	2016		2015		2016			2015
Interest rate swap	$	182	$	230	$	(410	)	$	(214	)	Interest expense