Stockholders' Equity (Cash Dividends Paid) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended		6 Months Ended		1 Months Ended
	Jun. 03, 2014 Common Stock [Member]	Mar. 03, 2014 Common Stock [Member]	Jun. 30, 2014 Common Stock [Member]	Jun. 30, 2014 Preferred Stock [Member]	Apr. 30, 2014 9.50% Series A Preferred Stock [Member] Preferred Stock [Member]	Jan. 30, 2014 9.50% Series A Preferred Stock [Member] Preferred Stock [Member]	Apr. 30, 2014 9.00% Series B Preferred Stock [Member] Preferred Stock [Member]	Jan. 30, 2014 9.00% Series B Preferred Stock [Member] Preferred Stock [Member]
Dividends Payable [Line Items]
Record Date	May 16, 2014	Feb. 17, 2014			Apr. 29, 2014	Jan. 29, 2014	Apr. 29, 2014	Jan. 29, 2014
Payment Date	Jun. 03, 2014	Mar. 03, 2014			Apr. 30, 2014	Jan. 30, 2014	Apr. 30, 2014	Jan. 30, 2014
Per Share Amount (in dollars per share)	$ 0.250	$ 0.250			$ 2.375	$ 2.375	$ 2.250	$ 2.250
Total Dividend Paid	$ 1,826	$ 1,813	$ 3,639	$ 2,611	$ 594	$ 594	$ 711	$ 712