Business Combinations, Market Street (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Allocation of Total Purchase Price Consideration [Abstract]
Goodwill	$ 269,570	$ 269,383
Market Street [Member]
Business Combinations [Abstract]
Date of acquisition	Sep. 17, 2015
Cash paid for acquisition	$ 3,000
Common stock issued	1,100
Net working capital settlement	300
Fair value estimate of additional earnings-based contingent consideration	1,000
Transaction costs	$ 500
Period to realize additional earnings-based contingent consideration	12 months
Allocation of Total Purchase Price Consideration [Abstract]
Acquired tangible assets	$ 1,300
Acquired intangible assets	3,100
Liabilities assumed	(2,900)
Goodwill	3,900
Total purchase price	5,400
Tax deductible amount of goodwill	$ 0
Market Street [Member] | Minimum [Member]
Allocation of Total Purchase Price Consideration [Abstract]
Intangible assets estimated useful life	9 months
Market Street [Member] | Maximum [Member]
Allocation of Total Purchase Price Consideration [Abstract]
Intangible assets estimated useful life	8 years