Goodwill and Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Balance at the beginning of year	$ 143,874	$ 140,341
Additions	5,334	3,533
Balance at end of period	$ 149,208	$ 143,874	$ 140,341
Impairment Testing
Goodwill impairment			$ 727
Impairment testing, Scenario one
Impairment Testing
Impairment testing, discounted cash flow analysis weightage assigned	50.00%
Impairment testing, Scenario two
Impairment Testing
Impairment testing, public company approach weightage assigned	50.00%