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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 31,661	$ 9,981	$ 63,835	$ 34,159
Defined benefit pension plans
Amortization of actuarial loss, net of tax of $170, $225, $479 and $593, respectively	271	359	766	947
Effect of settlements, net of tax of $-, $-, $- and $114, respectively	0	0	0	183
Other comprehensive income, net of tax	271	359	766	1,130
Comprehensive income	$ 31,932	$ 10,340	$ 64,601	$ 35,289

X

- Definition

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.

+ References

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount, after tax, of increase (decrease) to other comprehensive income from settlement and curtailment gain (loss) of defined benefit plan.

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

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