Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Preferred, Common and Treasury Shares Activity

	Number of Shares
Description		Preferred G1		Preferred G2		Common		Treasury
Balance as of December 31, 2012		1		1		435,328		—
Shares issued for preferred stock dividends		—		—		4		—
Treasury stock repurchase		—		—		—		33,389
Treasury stock retirements		—		—		(33,389	)	(33,389	)
Balance as of December 31, 2013		1		1		401,943		—
Shares issued for preferred stock dividends		—		—		2		—
Treasury stock repurchase		—		—		—		11,029
Treasury stock retirements		—		—		(11,029	)	(11,029	)
Preferred stock repurchased		(1	)	(1	)	—		—
Balance as of December 31, 2014		—		—		390,916		—