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Selected Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data (Unaudited) | Note 16. Selected Quarterly Financial Data (Unaudited)
|  | Quarter Ended |
In thousands, except per share amounts |  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 159,957 |  |  | $ | 168,512 |  |  | $ | 169,312 |  |  | $ | 164,346 |
Cost of revenues and operations |  |  | 19,086 |  |  |  | 22,804 |  |  |  | 24,034 |  |  |  | 26,443 |
Operating income |  |  | 7,166 |  |  |  | 24,557 |  |  |  | 28,331 |  |  |  | 23,870 |
Net income |  |  | 929 |  |  |  | 12,726 |  |  |  | 15,797 |  |  |  | 9,357 |
Earnings per share, basic |  |  | 0.01 |  |  |  | 0.18 |  |  |  | 0.23 |  |  |  | 0.14 |
Earnings per share, diluted |  |  | 0.01 |  |  |  | 0.18 |  |  |  | 0.23 |  |  |  | 0.14 |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 153,174 |  |  | $ | 156,624 |  |  | $ | 159,899 |  |  | $ | 156,565 |
Cost of revenues and operations |  |  | 15,902 |  |  |  | 15,540 |  |  |  | 18,176 |  |  |  | 15,923 |
Operating income |  |  | 27,181 |  |  |  | 28,873 |  |  |  | 39,374 |  |  |  | 38,828 |
Net income |  |  | 26,888 |  |  |  | 24,809 |  |  |  | 20,988 |  |  |  | 151,758 |
Earnings per share, basic |  |  | 0.38 |  |  |  | 0.35 |  |  |  | 0.29 |  |  |  | 2.12 |
Earnings per share, diluted |  |  | 0.38 |  |  |  | 0.35 |  |  |  | 0.29 |  |  |  | 2.11 |

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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Namespace Prefix: | us-gaap_
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