Segment Information - Costs Incurred on Long-lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	$ 573,052	$ 615,487	$ 1,895,449
Operating Segments [Member] | North America [Member] | Carolinas [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	21,993	72,252	15,582
Operating Segments [Member] | North America [Member] | Chicago Milwaukee [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	13,483	21,698	248,640
Operating Segments [Member] | North America [Member] | Houston [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	96,681	70,903	116,024
Operating Segments [Member] | North America [Member] | Lehigh Central PA [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	165,319	105,725	161,925
Operating Segments [Member] | North America [Member] | Minnesota [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	41,259	28,966	38,434
Operating Segments [Member] | North America [Member] | Orlando [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	5,344	7,827	10,953
Operating Segments [Member] | North America [Member] | Philadelphia [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	34,122	32,012	17,941
Operating Segments [Member] | North America [Member] | Richmond Hampton Roads [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	9,182	10,348	15,880
Operating Segments [Member] | North America [Member] | South Florida [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	34,089	30,063	148,165
Operating Segments [Member] | North America [Member] | Southeastern PA [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	9,047	39,638	39,590
Operating Segments [Member] | North America [Member] | Tampa [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	4,161	7,262	28,655
Operating Segments [Member] | North America [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	125,412	172,495	897,831
Operating Segments [Member] | UNITED KINGDOM | United Kingdom [Member]
Segment Reporting Information [Line Items]
Segments, Cost incurred on Long-lived Assets	$ 12,960	$ 16,298	$ 155,829