Summary of Significant Accounting Policies - Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Dec. 31, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification of deferred tax current assets to non-current assets	$ 900		$ 900
Additional tax expense	100
Taxes remitted for shares withheld from equity-based compensation transactions	246	$ 291
ASU 2016-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Taxes remitted for shares withheld from equity-based compensation transactions	$ 200	$ 300
Sales Revenue, Net [Member] | Time and Material or Progress Billing Method of Accounting [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue, percent	97.00%
Sales Revenue, Net [Member] | Proportional Method of Accounting [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue, percent	3.00%