Earnings Per Share Earnings Per Share - Reconciliation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Numerator for basic and diluted EPS — net income allocated to common stockholders	$ 238	$ 13,618
Denominator for basic EPS — weighted average number of shares (shares)	30,061,596	30,171,840
Add — dilutive effect of:
Weighted average number of incremental shares issuable from restricted stock units (shares)	106,311	89,123
Denominator for diluted EPS — weighted average number of shares and dilutive potential shares (shares)	30,167,907	30,260,963
Earnings per share:
Basic (usd per share)	$ 0.01	$ 0.45
Diluted (usd per share)	$ 0.01	$ 0.45