Borrowing Arrangements - Long-Term Debt (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Long-term Debt
Total Long-Term Debt	$ 111,441	$ 70,448
Less Current Portion of Long-Term Debt	(7,500)
Long-Term Debt	103,941	70,448
Japanese Term Loan due May 2017
Long-term Debt
Total Long-Term Debt	3,741	3,748
U.S. Credit Agreement
Long-term Debt
Total Long-Term Debt	$ 107,700	$ 66,700