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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 38,432	$ 44,230
Other comprehensive income (loss):
Change in unrealized gains on securities	0	(26)
Reclassification for amounts recognized in investment and other gains	0	(10,038)
Increase (decrease) in fair value of cash flow hedge	(1,646)	(465)
Less: reclassification adjustment for amounts recognized in net income	276	789
Total other comprehensive income (loss)	1,922	(8,810)
Comprehensive income	$ 40,354	$ 35,420

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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