Organization and Summary of Significant Accounting Policies (Other Comprehensive Income (Loss)) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 3,840,910,000	$ 3,916,928,000
Other comprehensive income (loss)	4,378,000	(7,479,000)
Reclassifications from accumulated other comprehensive income to net earnings	3,664,000	1,932,000
Net current period other comprehensive income (loss)	8,042,000	(5,547,000)
Ending balance	4,154,605,000	3,840,910,000
Gain or Loss on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(14,655,000)	(8,899,000)
Other comprehensive income (loss)	4,080,000	(7,688,000)
Reclassifications from accumulated other comprehensive income to net earnings	3,664,000	1,932,000
Net current period other comprehensive income (loss)	7,744,000	(5,756,000)
Ending balance	(6,911,000)	(14,655,000)
Income tax expense (benefit)	0	0
Gains and Losses on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	917,000	708,000
Other comprehensive income (loss)	298,000	209,000
Reclassifications from accumulated other comprehensive income to net earnings	0	0
Net current period other comprehensive income (loss)	298,000	209,000
Ending balance	1,215,000	917,000
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(13,738,000)	(8,191,000)
Ending balance	$ (5,696,000)	$ (13,738,000)