Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated other comprehensive (loss) income, Beginning Balance	$ 71,537	$ (18,946)
OCI before reclassifications	6,089	139,899
Amounts reclassified from AOCI	0	0
Net current period OCI	6,089	139,899
Accumulated other comprehensive (loss) income, Ending Balance	77,626	120,953
Unrealized gain (loss) on securities available for sale [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	119,309	19,432
OCI before reclassifications	13,125	148,789
Amounts reclassified from AOCI	0	0
Net current period OCI	13,125	148,789
Accumulated other comprehensive (loss) income, Ending Balance	132,434	168,221
Pro Rata Share Of Non Consolidated Subsidiaries Oci [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(11,501)	11,313
OCI before reclassifications	(8,286)	(3,647)
Amounts reclassified from AOCI	0	0
Net current period OCI	(8,286)	(3,647)
Accumulated other comprehensive (loss) income, Ending Balance	(19,787)	7,666
Change in value of interest rate Swap [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(31,882)	(50,065)
OCI before reclassifications	1,610	2,523
Amounts reclassified from AOCI	0	0
Net current period OCI	1,610	2,523
Accumulated other comprehensive (loss) income, Ending Balance	(30,272)	(47,542)
Other [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(4,389)	374
OCI before reclassifications	(360)	(7,766)
Amounts reclassified from AOCI	0	0
Net current period OCI	(360)	(7,766)
Accumulated other comprehensive (loss) income, Ending Balance	$ (4,749)	$ (7,392)