Summary of Significant Accounting Policies:Interest Rate Risk and Interest Rate Swaps (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) Derivative	Dec. 31, 2020 USD ($)
Interest Rate Derivatives [Line Items]
Long-term debt	$ 444,419	$ 443,792
Interest Rate Swap [Member]
Interest Rate Derivatives [Line Items]
Number of Derivative Instrument | Derivative	2
Interest Rate Swap [Member] | Level 2 [Member] | Other assets [Member]
Interest Rate Derivatives [Line Items]
Fair value of interest rate swap agreements, Asset	$ 700
Interest Rate Swap [Member] | Level 2 [Member] | Other Noncurrent Liabilities [Member]
Interest Rate Derivatives [Line Items]
Fair value of interest rate swap agreements, Liability	200	$ 600
Interest Rate Swap - $50 million notional amount fixed at 1.007% [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Derivatives [Line Items]
Interest rate swaps, notional amount	$ 50,000
Interest rate swaps, fixed interest rate	1.007%
Interest Rate Swap - $50 million notional amount fixed at 0.39% [Member] | Not Designated as Hedging Instrument [Member]
Interest Rate Derivatives [Line Items]
Interest rate swaps, notional amount	$ 50,000
Interest rate swaps, forward interest rate	0.39%
ABL Term Loan Due 2025
Interest Rate Derivatives [Line Items]
Long-term debt	$ 50,000
ABL Term Loan Due 2025 | London Interbank Offered Rate (LIBOR) [Member]
Interest Rate Derivatives [Line Items]
Debt Instrument, Description of Variable Rate Basis	one-month LIBOR