Organization and Significant Accounting Policies Organization and Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets		$ 3,068,000
Total current assets	$ 379,014,000	352,547,000
Total assets	734,528,000	699,780,000
Total long-term debt	386,211,000	385,833,000
Total current liabilities	130,141,000	123,754,000
Deferred income taxes (non-current)	3,370,000	2,820,000
Total liabilities and stockholders’ equity	734,528,000	699,780,000
As Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets		5,832,000
Total assets		702,544,000
Total long-term debt		388,597,000
Total liabilities and stockholders’ equity		702,544,000
Accounting Standards Update 2015-03 [Member] | Retrospective Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets		(2,764,000)
Total assets		(2,764,000)
Total long-term debt		(2,764,000)
Total liabilities and stockholders’ equity		(2,764,000)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Retained Deficit | Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (130,000)	$ 130,000