Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Segment Reporting [Abstract]
Assets, Net	$ 2,571,728		$ 2,595,408
Cash and cash equivalents	269,133	272,932	206,690	249,531	331,311	125,440
Short term investments	47,642		0
Other assets	79,019		83,880
TOTAL ASSETS	$ 2,967,522		$ 2,885,978