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Note 17 - Quarterly Results of Operations (Unaudited) - Quarterly Results of Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2017

^[1]

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2016

Sep. 30, 2016

Jun. 30, 2016

Mar. 31, 2016

^[2]

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Revenues

$ 203,306

$ 178,631

$ 164,326

$ 158,744

$ 190,978

$ 164,500

$ 158,832

$ 156,341

$ 705,007

$ 670,651

$ 724,240

Operating income (loss)

14,843

9,041

3,962

309

12,267

5,446

7,316

7,418

28,155

32,447

67,782

Net income

$ 49,298

$ 4,632

$ 1,548

$ (39)

$ 5,982

$ 2,869

$ 3,632

$ 4,352

$ 55,439

$ 16,835

$ 42,085

Basic income per share (in dollars per share)

$ 2.70

$ 0.25

$ 0.08

$ 0

$ 0.33

$ 0.16

$ 0.20

$ 0.21

$ 3.03

$ 0.93

$ 2.32

Diluted income per share (in dollars per share)

$ 2.69

$ 0.25

$ 0.08

$ 0

$ 0.33

$ 0.16

$ 0.20

$ 0.21

$ 3.02

$ 0.92

$ 2.30

[1]	Includes $40.1m one-time benefit related to the Tax Cuts and Jobs Act.
[2]	Adjusted from 10-Q as filed due to implementation of ASU 2016-09.

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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+ References

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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