Investments In Unconsolidated Companies (Statutory Business Trusts' Condensed Combined Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Investments [Line Items]
Interest expense									$ (1,933)	$ (9,695)	$ (15,572)
Net income (loss)	49,052	7,695	(2,849)	(6,532)	(14,785)	277,062	(12,307)	(14,208)	47,660	235,762	(28,741)
Statutory Business Trust [Member]
Schedule of Investments [Line Items]
Interest income from junior subordinated debntures										9,695	14,776
Interest expense										(9,414)	(15,031)
Net income (loss)										$ 281	$ (255)