Redeemable Preferred Stock (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Reconciliation of Company's 7% preferred stock activity

The following table summarizes the Company’s 7% preferred stock activity for the three months ended March 31, 2013:

	Preferred Shares			Preferred Stock
Balance at January 1, 2013		958,333		$	121,649
Stock-based compensation		—			405
Repurchased preferred stock shares		(318	)		(57	)
Forfeited shares		(998	)		—
Balance at March 31, 2013		957,017		$	121,997

The following table summarizes the Company’s 7% preferred stock activity for the years ended December 31, 2011 and 2012:

	Preferred Shares			Preferred Stock
Balance at December 31, 2010		1,052,444		$	130,339
Stock-based compensation		—			1,549
Repurchased preferred stock shares		(46,658	)		(5,972	)
Forfeited shares		(2,678	)		—
Balance at December 31, 2011		1,003,108		$	125,916
Stock-based compensation		—			1,464
Converted preferred stock shares		(531	)		(68	)
Repurchased preferred stock shares		(44,244	)		(5,663	)
Balance at December 31, 2012		958,333		$	121,649