river play in big pot, standard?

[steaknshake925]

1/2nl on Sportingbet, 5max. villain is uberfish calling station. me and villain both have about 200.

2 guys limp, i limp on button w/ 6h7d, SB completes, villain checks in BB. pot is $10.

flop is 3 4 5 with two diamonds. SB checks, villain bets $10. limpers fold, i raise to $40, SB folds. villain thinks a bit and calls. pot is $86ish

turn: 3s 4d 5d Kd three diamonds now.
villain checks, i bet $50. villain thinks long time and calls. pot is $180ish

river: 3s 4d 5d Kd Kc
villain checks, i check. yes? just wanted to make sure the check-behind is fairly standard.