Stock-Based Compensation (Restricted Shares) (Details) - USD ($)		3 Months Ended		6 Months Ended
	Apr. 01, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period				4,347	3,680
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition				2 years 1 month 6 days
Share-based Payment Arrangement, Expense		$ 658,000	$ 1,023,000	$ 2,068,000	$ 2,588,000
Weighted - Average Grant Date Fair Value (in dollars per share)
Unrestricted Stock Granted to Employees	18,952
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense		0	0	0	(12,000)
Restricted Shares
Weighted - Average Grant Date Fair Value (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested				$ 2,500,000	2,000,000.0
Restricted Shares | Maximum | Employees
Weighted - Average Grant Date Fair Value (in dollars per share)
Awards expiration period				5 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense		$ 585,000	$ 955,000	$ 1,784,000	2,335,000
Time-Based Vesting | Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period				21,122
Number of Shares (in shares)
Outstanding at January 1				67,758
Released				4,877
Forfeited				500
44377		83,503		83,503
Weighted - Average Grant Date Fair Value (in dollars per share)
Outstanding at January 1				$ 23.71
Awarded				33.14
Released				34.98
Forfeited				34.75
44377		$ 25.37		$ 25.37
Performance-Based Vesting | Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period				76,819
Number of Shares (in shares)
Outstanding at January 1				250,992
Awarded				76,819
Released				73,611
Forfeited				4,107
44377		250,093		250,093
Weighted - Average Grant Date Fair Value (in dollars per share)
Outstanding at January 1				$ 33.36
Awarded				31.48
Released				35.43
Forfeited				32.57
44377		$ 32.19		$ 32.19
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	$ 396,000
Treasury Stock | Director [Member]
Weighted - Average Grant Date Fair Value (in dollars per share)
Shares Issued, Value, Share-based Payment Arrangement, Forfeited				$ 135,000	120,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense				$ 34,000	$ 30,000