Long-Term Debt - Components of Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Components of Long-term debt
Long-term debt	$ 200,000		$ 196,100
Current portion of long-term debt	2,000		15,900
Long-term debt (less current portion)	198,000		180,200
Fair value of long-term debt	200,000	[1]	196,100	[1]
Variable rate credit facilities
Components of Long-term debt
Long-term debt	0		0
Term loan
Components of Long-term debt
Long-term debt	$ 200,000		$ 196,100

[1] For 2013, fair value of the term loan was estimated based on quoted private market transactions and are classified as Level 1 in the fair value hierarchy. For 2012, fair value of the term loan was estimated based on current rates available to the Company for debt of the same remaining maturity and are classified as Level 2 in the fair value hierarchy.