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Goodwill and intangible assets (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Core Deposit and Other Intangibles
Core deposit and other intangibles are as follows as of the indicated dates:
 
 
Core deposit and other intangibles
 
 
 
Gross Carrying Amount

 
Accumulated Amortization

 
Net Carrying Amount

December 31, 2018
 
 
 
 
 
 
Core deposit intangible
 
$
38,915

 
$
(29,901
)
 
$
9,014

Leasehold intangible
 
587

 
(127
)
 
460

Customer base trust intangible
 
1,600

 
(227
)
 
1,373

Manufactured housing servicing intangible
 
1,088

 
(307
)
 
781

Total core deposit and other intangibles
 
$
42,190

 
$
(30,562
)
 
$
11,628

 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
Core deposit intangible
 
$
38,915

 
$
(27,121
)
 
$
11,794

Leasehold intangible
 
587

 
(38
)
 
549

Customer base trust intangible
 
1,600

 
(67
)
 
1,533

Manufactured housing servicing intangible
 
1,088

 
(62
)
 
1,026

Total core deposit and other intangibles
 
$
42,190

 
$
(27,288
)
 
$
14,902
Schedule of Estimated Aggregate Amortization Expense of Core Deposit and Other Intangibles
The estimated aggregate amortization expense of core deposit and other intangibles for each of the next five years and thereafter is as follows:
December 31, 2019
 
$
2,862

December 31, 2020
 
2,476

December 31, 2021
 
2,090

December 31, 2022
 
1,614

December 31, 2023
 
1,101

Thereafter
 
1,485

 
 
$
11,628