Solar Energy Systems, Leased and To Be Leased - Net - Schedule of Future Minimum Annual Lease Receipts from Sub-lessees (Detail) $ in Thousands	Dec. 31, 2015 USD ($)
Operating Leased Assets [Line Items]
2016	$ 89,801
2017	90,352
2018	91,888
2019	93,457
2020	95,079
Thereafter	1,347,298
Total	1,807,875
Subleases [Member]
Operating Leased Assets [Line Items]
2016	2,444
2017	2,473
2018	2,503
2019	2,534
2020	2,566
Thereafter	31,591
Total	$ 44,111