Long-Term Debt - Summary of Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Long-term Debt	$ 56,278	$ 78,190
Current maturities of long-term debt	(952)	(72,532)
Long-term debt, less current maturities	55,326	5,658
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	0	71,764
Senior Notes	50,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.50%
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 6,278	$ 6,426