Short-Term and Long-Term Debt Short-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Short-term Debt [Abstract]
Current portion of long-term debt	$ 8,434	$ 6,992
Line of Credit Facility, Remaining Borrowing Capacity	$ 11,217
Minimum [Member] | LIBOR [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%
Maximum [Member] | LIBOR [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%