Stockholders' Equity (Details) (USD $)	0 Months Ended				3 Months Ended	12 Months Ended				0 Months Ended		12 Months Ended
	Mar. 30, 2014	Nov. 15, 2013	Nov. 16, 2012	Feb. 21, 2012	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 30, 2011	Feb. 21, 2012 Common Stock [Member]	Mar. 30, 2011 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]
Stockholders Equity [Line Items]
Gross proceeds from the sale of common stock				$ 225,000,000
Sale of common stock, shares										0	6,122,449	5,750,000
Sale of common stock, price per share				$ 36.75					$ 31.50
Proceeds from Issuance of Common Stock						0	218,961,000	175,229,000
Stock repurchase program, authorized amount		70,000,000	100,000,000
Dividends declared, per share						$ 0.50
Common stock dividends declared, quarterly	$ 0.125					$ 0.125
Dividends paid						$ 18,633,000	$ 0	$ 0
Dividends, payment date					Mar. 31, 2014
Dividends, record date					Mar. 03, 2014