Summary Of Significant Accounting Policies (Accounting Changes To Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Balance					$ 181,618					$ 146,890	$ 181,618	$ 146,890	$ 138,951
Net income	$ 4,960	[1]	$ 1,297	$ 5,027	3,082	$ 7,426	[1]	$ 1,576	$ 19,051	3,048	14,366	31,101	9,678	[2]
Balance	180,547					181,618					180,547	181,618	146,890
Deferred tax asset															$ 26,235	$ 24,585	$ 24,746
Other assets															6,129		5,082
Total Assets															439,028		423,403
Retained earnings															47,616	$ 33,250	33,056
Total stockholders’ equity	$ 180,547				181,618	181,618				146,890	181,618	146,890	138,951		$ 180,547		181,618
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Balance					181,241					146,615	181,241	146,615	138,951
Net income												30,999	9,403
Balance						181,241						181,241	146,615
Deferred tax asset																	24,908
Other assets																	4,543
Total Assets																	423,026
Retained earnings																	32,679
Total stockholders’ equity					181,241	181,241				146,615	181,241	146,615	138,951				181,241
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Balance					377					275	377	275
Net income												102	275
Balance						377						377	275
Deferred tax asset																	(162)
Other assets																	539
Total Assets																	377
Retained earnings																	377
Total stockholders’ equity					$ 377	$ 377				$ 275	$ 377	$ 275	$ 275				$ 377

[1] Net income for the 4th quarter of 2017 includes approximately $2.5 million net tax benefit from non-recurring items of tax benefit and expense related to the Tax Cuts and Jobs Act enacted December 2017 and dissolution of a non-operating foreign subsidiary.

[2] Certain prior year balances have been reclassified to conform to the 2017 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).