Income Taxes (Dividend Paid Deduction) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Cash dividends paid	$ 38,933	$ 32,406	$ 28,089
Portion designated as capital gain distribution	(2,356)	(7,762)	(9,920)
Return of capital	(12,583)	(793)	(3,572)
Taxable income subject to the 90% dividend requirement	$ 23,994	$ 23,851	$ 14,597