Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Total		$ 1,103,000
Impaired residential mortgage loan
Financing Receivable, Impaired [Line Items]
Total		58,000
Impaired commercial real estate loan
Financing Receivable, Impaired [Line Items]
Total		463,000
Impaired commercial business loan
Financing Receivable, Impaired [Line Items]
Total		582,000
Level 3 | Impaired residential mortgage loan
Financing Receivable, Impaired [Line Items]
Total		58,000
Level 3 | Impaired commercial real estate loan
Financing Receivable, Impaired [Line Items]
Total		463,000
Level 3 | Impaired commercial business loan
Financing Receivable, Impaired [Line Items]
Total		582,000
Nonrecurring
Financing Receivable, Impaired [Line Items]
Total	$ 0
Nonrecurring | Level 1
Financing Receivable, Impaired [Line Items]
Total		0
Nonrecurring | Level 1 | Impaired residential mortgage loan
Financing Receivable, Impaired [Line Items]
Total		0
Nonrecurring | Level 1 | Impaired commercial business loan
Financing Receivable, Impaired [Line Items]
Total		0
Nonrecurring | Level 2
Financing Receivable, Impaired [Line Items]
Total		0
Nonrecurring | Level 2 | Impaired residential mortgage loan
Financing Receivable, Impaired [Line Items]
Total		0
Nonrecurring | Level 2 | Impaired commercial business loan
Financing Receivable, Impaired [Line Items]
Total		0
Nonrecurring | Level 3
Financing Receivable, Impaired [Line Items]
Total		1,103,000
Nonrecurring | Level 3 | Impaired residential mortgage loan
Financing Receivable, Impaired [Line Items]
Total		58,000
Nonrecurring | Level 3 | Impaired commercial real estate loan
Financing Receivable, Impaired [Line Items]
Total		463,000
Nonrecurring | Level 3 | Impaired commercial business loan
Financing Receivable, Impaired [Line Items]
Total		$ 582,000