Commitments and Contingencies (Details 2) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Changes in the entity's loan loss and related legal reserves
Balance at the beginning of the period	$ 1,397	$ 11,472
Provision for losses	242	6,056
Settlements made	(322)	(231)
Balance at the end of the period	$ 1,317	17,297
Product warranty
Number of years of product warranty for workmanship and materials	1 year
Number of years of product warranty for mechanical systems	2 years
Number of years of product warranty for structural systems	10 years
Product liability reserves
Balance at the beginning of the period	$ 25,556	23,139
Warranties issued	3,963	4,562
Changes in liability for accruals related to pre-existing warranties	(13)	657
Settlements made	(5,018)	(4,679)
Balance at the end of the period	24,488	23,679
Legal reserves
Changes in entity's legal reserves
Legal reserves	6,400		$ 5,700
Reasonably possible losses in excess of amounts accrued	1,300
RHIC | Insurance reserves
Changes in entity's subcontractor insurance reserves
Balance at the beginning of period	12,521	13,857
Insurance expense provisions or adjustments	0	1,900
Loss expenses paid	(1,569)	(2,488)
Balance at the end of period	$ 10,952	$ 13,269