Employee Benefit and Deferred Compensation Plans (Details 4) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($)
Pension Benefits
Estimated costs that will be amortized from accumulated other comprehensive income into net periodic cost
Prior service cost	$ 0
Actuarial loss	400
Total	400
Other Benefits
Estimated costs that will be amortized from accumulated other comprehensive income into net periodic cost
Prior service cost	0
Actuarial loss	50
Total	$ 50

Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration