Stockholders' Equity and Earnings Per Share Reconciliation of the components of Basic and Diluted Net Income (loss) per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2012
Earnings Per Share, Basic and Diluted
Basic: Pro forma net income attributable to common stock	$ 1,820	$ 291	$ 8,767	$ 951	$ 11,829
Basic: Pro forma net income attributable to common stock, shares					19,720,734
Basic: Pro forma net income attributable to common stock, per share					$ 0.60
Effect of Dilutive Securities: Dilutive effect of potential common shares issuable					0
Effect of Dilutive Securities: Dilutive effect of potential common shares issuable, shares					3,040
Diluted: Pro forma net income attributable to common stock					$ 11,829
Diluted: Pro forma net income attributable to common stock, shares					19,723,774
Diluted: Pro forma net income attributable to common stock, per share					$ 0.60