Stockholders' Equity (Details) (USD $)	0 Months Ended		3 Months Ended
	May 07, 2013	Feb. 13, 2013	Mar. 31, 2013
Class of Stock [Line Items]
Stock Repurchased			56,191
Dividend amount to be paid, per common share	$ 0.2400	$ 0.2325
Dividend, declaration date	May 07, 2013	Feb. 12, 2013
Dividend, date to be paid	Jun. 04, 2013	Mar. 04, 2013
Dividend, date of record	May 20, 2013	Feb. 25, 2013
2012 Repurchase Program [Member]
Class of Stock [Line Items]
Maximum number of shares authorized to be repurchased			5,000,000
Stock Repurchased			0