Capitalized Software Development Costs (Tables)

12 Months Ended

Dec. 31, 2015

Finite-Lived Intangible Assets, Net [Abstract]

Schedule of total capitalized software development costs subject to amortization and related amortization expense

The following table outlines the total capitalized software development costs subject to amortization and the related amortization expense:

(in thousands)	Years ended December 31,
	2015			2014			2013
Gross carrying amount	$	81,007		$	67,820		$	58,408
Accumulated amortization	(34,210		)	(25,210		)	(17,804		)
Net carrying amount	$	46,797		$	42,610		$	40,604
Amortization expense	$	9,000		$	7,406		$	6,909

Schedule of estimated future amortization expense related to capitalized software development costs

The following table outlines the estimated future amortization expense related to capitalized software development costs as of December 31, 2015: 

(in thousands)
	Years ending December 31,		Estimated amortization expense
	2016	$	9,314
	2017		8,674
	2018		4,906
	2019		3,467
	2020		2,405