XML 158 R130.htm IDEA: XBRL DOCUMENT

Income Taxes - Reconciliation Between Cash Dividends Paid and Dividends Paid Deduction (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Dividends paid	$ 193,101	$ 153,617	$ 75,253
Plus: Deemed dividends on convertible debt	9,987	7,875
Less: Dividends designated to prior year	(7,030)	(6,967)	(6,967)
Plus: Dividends designated from the following year	6,608	7,030	6,967
Less: Return of capital	(169,747)	(112,612)	(58,861)
Dividends paid deduction	$ 32,919	$ 48,943	$ 16,392