Bank Credit Agreements and Other Short-Term and Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total long-term debt	$ 466,223	$ 141,074
Current portion of long-term debt	(10,282)	(287)
Long-term debt, net of current portion	455,941	140,787
Notes Payable To Bank
Debt Instrument [Line Items]
Total long-term debt	1,723	2,074
Term Loan and Revolver
Debt Instrument [Line Items]
Total long-term debt	$ 464,500	$ 139,000