Has the Supreme Court become less ideological?

Or, maybe I should have asked: Have the Republicans on the court become less ideological?

Justice Same-Party Agreement, % Opposite-Party  Agreement, % Propensity to Same-Party Agreement
Roberts 74.5 82.3 0.91
Kennedy 73.8 84.8 0.87
Scalia 76.5 74.3 1.03
Alito 77.3 75.3 1.03
Thomas 73.5 62 1.19
Breyer 92.7 82.5 1.12
Ginsburg 91.3 75.2 1.21
Sotomayor 91.3 74 1.23
Kagan 90.7 77.3 1.17

The numbers in the second and third columns are averages derived from Scotusblog (scroll down to the bottom). The last column is the second column divided by the third, so >1 means greater agreement with co-partisans.

Roberts and Kennedy are more likely to agree with the Democrats than with the other Republicans. I don’t think this has happened before. Last year, Roberts agreed with his co-partisans 88.8% of the time, and his opposite-partisans 81% of the time. For Kennedy, it was 86.8% and 82.25%. The Democrats and Thomas follow the ideologically polarized pattern of prior years.