Accumulated Other Comprehensive Income ("AOCI") (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated other comprehensive (loss) income, Beginning Balance	$ 72,609	$ 77,626	$ 93,267	$ 71,537
OCI before reclassifications	(21,996)	14,595	(42,654)	20,684
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	(21,996)	14,595	(42,654)	20,684
Accumulated other comprehensive (loss) income, Ending Balance	50,613	92,221	50,613	92,221
Interest rate Swap [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(26,579)	(30,272)	(25,803)	(31,882)
OCI before reclassifications	2,849	(545)	2,073	1,065
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	2,849	(545)	2,073	1,065
Accumulated other comprehensive (loss) income, Ending Balance	(23,730)	(30,817)	(23,730)	(30,817)
Securities available for sale [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	112,442	132,434	133,774	119,309
OCI before reclassifications	(25,000)	1,878	(46,332)	15,003
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	(25,000)	1,878	(46,332)	15,003
Accumulated other comprehensive (loss) income, Ending Balance	87,442	134,312	87,442	134,312
Pro Rata Share Of Non Consolidated Subsidiaries Oci [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(8,835)	(19,787)	(8,992)	(11,501)
OCI before reclassifications	(1,191)	14,163	(1,034)	5,877
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	(1,191)	14,163	(1,034)	5,877
Accumulated other comprehensive (loss) income, Ending Balance	(10,026)	(5,624)	(10,026)	(5,624)
Other [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(4,419)	(4,749)	(5,712)	(4,389)
OCI before reclassifications	1,346	(901)	2,639	(1,261)
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	1,346	(901)	2,639	(1,261)
Accumulated other comprehensive (loss) income, Ending Balance	$ (3,073)	$ (5,650)	$ (3,073)	$ (5,650)