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Basis of Presentation (Details Textual)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
USD ($)
segment
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Number of reportable segments | segment 4    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Unrecognized excess tax benefits recognized as current tax expense $ 2,300    
Operating activities in Condensed Consolidated Statements of Cash Flow 58,479 $ 56,982  
Financing activities in Condensed Consolidated Statements of Cash Flow (270,482) $ (68,935)  
Accounting Standards Update 2016-09 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative-effect adjustment- ASU 2016-09 adoption [1]     $ 149
Operating activities in Condensed Consolidated Statements of Cash Flow 2,300    
Financing activities in Condensed Consolidated Statements of Cash Flow $ (2,300)    
Additional Paid-in Capital [Member] | Accounting Standards Update 2016-09 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative-effect adjustment- ASU 2016-09 adoption [1]     425
Retained Earnings [Member] | Accounting Standards Update 2016-09 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative-effect adjustment- ASU 2016-09 adoption [1]     $ (276)
[1] See Note 1 of the Notes to Condensed Consolidated Financial Statements for discussion of accounting guidance adopted during the period.