Accumulated Other Comprehensive Income Narrative (Details) - USD ($) $ in Thousands		Jan. 01, 2018	Jan. 01, 2017
Retained Earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification due to change in accounting principles	[1]		$ 334
Unrealized gain/ (loss) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification due to change in accounting principles		$ 5
Unrealized gain/ (loss) on securities available-for-sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification due to change in accounting principles		(339)
ASU 2017-12 | Retained Earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification due to change in accounting principles		5
ASU 2017-12 | Unrealized gain/ (loss) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification due to change in accounting principles		(5)
ASU 2016-01 | Retained Earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification due to change in accounting principles		339
ASU 2016-01 | Unrealized gain/ (loss) on securities available-for-sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification due to change in accounting principles		$ (339)

[1] Reclassification due to the adoption of ASU 2016-01 and ASU 2017-12. See Part I. Item 1. “Financial Statements and Supplementary Data - Note 15: Recent Accounting Pronouncements.”