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Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Adoption of ASU 2014-09 (Details)

v3.10.0.1
Summary of Significant Accounting Policies - Adoption of ASU 2014-09 (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Condensed Consolidated Statements of Income: Ìý Ìý Ìý Ìý Ìý
Revenue $ 73,168 $ 51,977 $ 207,019 $ 114,677 Ìý
Taxes, other than income taxes 130 66 387 183 Ìý
Income taxes 12,433 16,322 36,415 35,995 Ìý
Net income $ 50,762 $ 33,002 $ 147,056 $ 72,611 Ìý
Net income per Sub-share Certificate (in dollars per share) $ 6.52 $ 4.20 $ 18.86 $ 9.22 Ìý
ASSETS Ìý Ìý Ìý Ìý Ìý
Accrued receivables $ 39,615 Ìý $ 39,615 Ìý $ 17,773
Deferred tax liability (114) Ìý (114) Ìý (114)
Liabilities and Capital: Ìý Ìý Ìý Ìý Ìý
Unearned revenue Ìý Ìý Ìý Ìý 8,364
Other taxes payable Ìý Ìý Ìý Ìý 0
Net proceeds from all sources $ 195,805 Ìý $ 195,805 Ìý 105,902
As reported in prior year Ìý Ìý Ìý Ìý Ìý
Condensed Consolidated Statements of Income: Ìý Ìý Ìý Ìý Ìý
Revenue Ìý $ 42,476 Ìý $ 94,054 Ìý
Taxes, other than income taxes Ìý 797 Ìý 2,219 Ìý
Income taxes Ìý 12,687 Ìý 27,945 Ìý
Net income Ìý $ 26,405 Ìý $ 58,002 Ìý
Net income per Sub-share Certificate (in dollars per share) Ìý $ 3.36 Ìý $ 7.37 Ìý
ASSETS Ìý Ìý Ìý Ìý Ìý
Accrued receivables Ìý Ìý Ìý Ìý 18,206
Deferred tax asset Ìý Ìý Ìý Ìý 6,992
Liabilities and Capital: Ìý Ìý Ìý Ìý Ìý
Unearned revenue Ìý Ìý Ìý Ìý 41,375
Other taxes payable Ìý Ìý Ìý Ìý 433
Net proceeds from all sources Ìý Ìý Ìý Ìý 79,997
Retrospective Adjustment | Accounting Standards Update 2014-09 Ìý Ìý Ìý Ìý Ìý
Condensed Consolidated Statements of Income: Ìý Ìý Ìý Ìý Ìý
Revenue Ìý $ 9,501 Ìý $ 20,623 Ìý
Taxes, other than income taxes Ìý (731) Ìý (2,036) Ìý
Income taxes Ìý 3,635 Ìý 8,050 Ìý
Net income Ìý $ 6,597 Ìý $ 14,609 Ìý
Net income per Sub-share Certificate (in dollars per share) Ìý $ 0.84 Ìý $ 1.85 Ìý
ASSETS Ìý Ìý Ìý Ìý Ìý
Accrued receivables Ìý Ìý Ìý Ìý (433)
Deferred tax liability Ìý Ìý Ìý Ìý (7,106)
Liabilities and Capital: Ìý Ìý Ìý Ìý Ìý
Unearned revenue Ìý Ìý Ìý Ìý (33,011)
Other taxes payable Ìý Ìý Ìý Ìý (433)
Net proceeds from all sources Ìý Ìý Ìý Ìý $ 25,905