Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of the components of intangible assets

ntangible assets consisted of customer relationships as follows:

	June 30, 2016				December 31, 2015
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	$	67,423	$	60,244	$	67,438	$	57,188

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

he Company recorded the following aggregate amortization expense associated with intangibles:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Amortization expense	$	1,533	$	2,674	$	3,060	$	5,346

Summary of the estimated annual amortization expense

The following is a summary of the estimated annual amortization expense for the remainder of 2016 and each of the subsequent years:

2016	$	3,068
2017	$	4,111
2018	$	—
2019	$	—
2020	$	—