Significant Accounting Policies (Maturities Related To Operating Leases) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Maturities Related To Operating Leases [Line Items]
2020	$ 4,835
2021	4,761
2022	4,524
2023	3,895
Total lease payments	$ 62,423
Accounting Standards Update 2016-02 [Member]
Maturities Related To Operating Leases [Line Items]
2019		$ 4,079
2020		2,783
2021		2,748
2022		2,700
2023		2,646
Total lease payments		$ 14,956

Maturities Related To Operating Leases [Line Items]

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- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.

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