Shareholder-Designated Contribution Plan (Details) (USD $)	0 Months Ended	3 Months Ended			9 Months Ended
	Aug. 06, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Shareholder-Designated Contribution Plan [Abstract]
Shareholder-designated contribution		$ 313,000	$ 5,000,000	$ 0	$ 5,313,000	$ 0
Shareholder-designated contribution, diluted per share (in dollars per share)		$ 0.01	$ 0.11		$ 0.12
Initial contribution per registered share to Shareholder-designated charitable contribution program (in dollars per share)					$ 0.25
Expected expense related to Shareholder-designated charitable contribution program	$ 5,300,000