Dividends Declared - Schedule of Dividends Declared (Detail) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2013
Equity [Abstract]
Record Date	Sep. 30, 2013	Jun. 28, 2013	Mar. 28, 2013
Date Paid	Oct. 07, 2013	Jul. 08, 2013	Apr. 08, 2013
Amount per share	$ 0.125	$ 0.125	$ 0.125	$ 0.375