Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments

Schedule of income effects of cash flow hedging relationships

		Amount of Loss (Gain) Recognized on
		Derivatives in the Statements of Income
Derivatives in Cash Flow Hedging	Location of Loss (Gain) Recognized on	Years Ended December 31,
Relationships	Derivatives in the Statements of Income	2016		2015		2014
		(in thousands)
Interest rate contracts	Interest expense	$	25	$	—	$	(499)
Total		$	25	$	—	$	(499)

Schedule of information about financial statement effects related to cash flow hedges

	Amount of Gain (Loss) Recognized						Location of Loss (Gain)	Amount of Loss (Gain) Reclassified
	in OCI on Derivatives						Reclassified from	from Accumulated OCI into Income
Derivatives in	(Effective Portion)						Accumulated OCI into	(Effective Portion)
Cash Flow Hedging	Years Ended December 31,						Income	Years Ended December 31,
Relationships	2016		2015		2014		(Effective Portion)	2016		2015		2014
	(in thousands)							(in thousands)
Interest rate contracts	$	69	$	—	$	—	Interest expense	$	25	$	—	$	(499)
Total	$	69	$	—	$	—	Total	$	25	$	—	$	(499)