Organization and Summary of Significant Accounting Policies (Changes in AOCI) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2017	$ 3,840,910
Other comprehensive income (loss)	(2,296)
Reclassifications from accumulated other comprehensive income to net earnings	525
Net current period other comprehensive income (loss)	(1,771)
Ending balance, March 31, 2018	3,864,506
Gains or (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2017	(14,655)
Other comprehensive income (loss)	(2,164)
Reclassifications from accumulated other comprehensive income to net earnings	525
Net current period other comprehensive income (loss)	(1,639)
Ending balance, March 31, 2018	(16,294)
Gains or (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2017	917
Other comprehensive income (loss)	(132)
Reclassifications from accumulated other comprehensive income to net earnings	0
Net current period other comprehensive income (loss)	(132)
Ending balance, March 31, 2018	785
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2017	(13,738)
Ending balance, March 31, 2018	$ (15,509)