Supplemental Comprehensive Income Disclosures (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance			$ (7,027)	$ (2,386)
Other comprehensive income (loss) before reclassification adjustment	$ 1,106	$ 2,471	2,759	9,017
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(43)	233	(378)	1,361
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			2,381	10,378
Amounts reclassified from accumulated other comprehensive income (loss)			(345)	(45)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	3	17	(47)	27
Total other comprehensive (loss) income	1,092	2,669	2,036	10,333
Accumulated Other Comprehensive Income (Loss), Ending Balance	(4,991)	7,947	(4,991)	7,947
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance			(7,455)	(2,956)
Other comprehensive income (loss) before reclassification adjustment			2,759	9,017
Amounts reclassified from accumulated other comprehensive income (loss)			(392)	(18)
Total other comprehensive (loss) income			2,367	8,999
Accumulated Other Comprehensive Income (Loss), Ending Balance	(5,088)	6,043	(5,088)	6,043
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance			225	10
Other comprehensive income (loss) before reclassification adjustment			0	0
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Total other comprehensive (loss) income			0	0
Accumulated Other Comprehensive Income (Loss), Ending Balance	225	10	225	10
Derivative [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance			203	560
Total other comprehensive (loss) income			(331)	1,334
Accumulated Other Comprehensive Income (Loss), Ending Balance	$ (128)	$ 1,894	(128)	1,894
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive (loss) income			$ 2,036	$ 10,333