Per MLBTR.com
The Tigers announced that they have agreed to extensions with president and general manager Dave Dombrowski and manager Jim Leyland, whose contracts were set to expire after 2011. Dombrowski's extension runs through 2015, while Leyland's extension covers the 2012 season.

Owner Mike Ilitch said the Tigers are confident in Leyland, who is in his sixth season as Detroit's skipper, and Dombrowski, who is in his tenth season with the Tigers. The Tigers also announced that they have extended the contracts of assistant GM Al Avila, special assistant David Chadd, VP of player personnel Scott Reid and legal counsel John Westhoff.

“Collectively, it’s as fine a group of quality baseball people as you will find,” Dombrowski said. “They continue to make significant contributions to the organization.”

The Tigers, who currently lead the AL Central, have a record of 485-442 under Leyland. The 2006 Tigers made it to the World Series under Leyland and Dombrowski, though Detroit hasn't returned to the playoffs since.
Leyland looks poised to reach the postseason for the 7th time in his career, 2nd with the Tigers. Leyland has done a good job with this squad this year overcoming a weak rotation and having to mix things up in the OF and 3B. Dombrowski has Verlander, Cabrera and VMart to build around for the next few years so as long as he doesn't make anymore Dontrelle Willis/Joaquin Benoit deals, he should be near the Central for a while.