Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Reconciliation [Abstract]
Net income (loss)	$ (6,018)	$ 145,929
Weighted average common shares outstanding (in shares)	42,275	43,250
Assumed dilutive effect of stock option exercise (in shares)	0	0
Weighted average common shares outstanding assuming dilution (in shares)	42,275	43,250
Net income (loss) per common share - basic (in dollars per share)	$ (0.14)	$ 3.37
Net income (loss) per common share - assuming dilution (in dollars per share)	$ (0.14)	$ 3.37
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	0	0