Organization and Summary of Significant Accounting Policies (Changes in AOCI) (Details) $ in Thousands	9 Months Ended
Sep. 30, 2017 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2016	$ 3,916,928
Ending balance, September 30, 2017	3,765,763
Gains or (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2016	(8,899)
Other comprehensive income (loss)	(7,688)
Reclassifications from accumulated other comprehensive income to net earnings	1,394
Net current period other comprehensive income (loss)	(6,294)
Ending balance, September 30, 2017	(15,193)
Gains on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2016	708
Other comprehensive income (loss)	118
Reclassifications from accumulated other comprehensive income to net earnings	0
Net current period other comprehensive income (loss)	118
Ending balance, September 30, 2017	826
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance, December 31, 2016	(8,191)
Other comprehensive income (loss)	(7,570)
Reclassifications from accumulated other comprehensive income to net earnings	1,394
Net current period other comprehensive income (loss)	(6,176)
Ending balance, September 30, 2017	$ (14,367)

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
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